protobuf: remove gogoproto

Removes gogo/protobuf from buildx and updates to a version of
moby/buildkit where gogo is removed.

This also changes how the proto files are generated. This is because
newer versions of protobuf are more strict about name conflicts. If two
files have the same name (even if they are relative paths) and are used
in different protoc commands, they'll conflict in the registry.

Since protobuf file generation doesn't work very well with
`paths=source_relative`, this removes the `go:generate` expression and
just relies on the dockerfile to perform the generation.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>

vendor/github.com/moby/buildkit/session/sshforward/generate.go

@@ -1,3 +1,3 @@
 package sshforward
 
-//go:generate protoc --gogoslick_out=plugins=grpc:. ssh.proto
+//go:generate protoc --go_out=paths=source_relative:. --go-grpc_out=paths=source_relative,require_unimplemented_servers=false:. ssh.proto

vendor/github.com/moby/buildkit/session/sshforward/ssh.proto

@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package moby.sshforward.v1;
 
-option go_package = "sshforward";
+option go_package = "github.com/moby/buildkit/session/sshforward";
 
 service SSH {
 	rpc CheckAgent(CheckAgentRequest) returns (CheckAgentResponse);
@@ -19,4 +19,4 @@ message CheckAgentRequest {
 }
 
 message CheckAgentResponse {
-}
+}

vendor/github.com/moby/buildkit/session/sshforward/ssh_grpc.pb.go

@@ -0,0 +1,152 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v3.11.4
+// source: ssh.proto
+
+package sshforward
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	SSH_CheckAgent_FullMethodName   = "/moby.sshforward.v1.SSH/CheckAgent"
+	SSH_ForwardAgent_FullMethodName = "/moby.sshforward.v1.SSH/ForwardAgent"
+)
+
+// SSHClient is the client API for SSH service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type SSHClient interface {
+	CheckAgent(ctx context.Context, in *CheckAgentRequest, opts ...grpc.CallOption) (*CheckAgentResponse, error)
+	ForwardAgent(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[BytesMessage, BytesMessage], error)
+}
+
+type sSHClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewSSHClient(cc grpc.ClientConnInterface) SSHClient {
+	return &sSHClient{cc}
+}
+
+func (c *sSHClient) CheckAgent(ctx context.Context, in *CheckAgentRequest, opts ...grpc.CallOption) (*CheckAgentResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(CheckAgentResponse)
+	err := c.cc.Invoke(ctx, SSH_CheckAgent_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *sSHClient) ForwardAgent(ctx context.Context, opts ...grpc.CallOption) (grpc.BidiStreamingClient[BytesMessage, BytesMessage], error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	stream, err := c.cc.NewStream(ctx, &SSH_ServiceDesc.Streams[0], SSH_ForwardAgent_FullMethodName, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &grpc.GenericClientStream[BytesMessage, BytesMessage]{ClientStream: stream}
+	return x, nil
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type SSH_ForwardAgentClient = grpc.BidiStreamingClient[BytesMessage, BytesMessage]
+
+// SSHServer is the server API for SSH service.
+// All implementations should embed UnimplementedSSHServer
+// for forward compatibility.
+type SSHServer interface {
+	CheckAgent(context.Context, *CheckAgentRequest) (*CheckAgentResponse, error)
+	ForwardAgent(grpc.BidiStreamingServer[BytesMessage, BytesMessage]) error
+}
+
+// UnimplementedSSHServer should be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedSSHServer struct{}
+
+func (UnimplementedSSHServer) CheckAgent(context.Context, *CheckAgentRequest) (*CheckAgentResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckAgent not implemented")
+}
+func (UnimplementedSSHServer) ForwardAgent(grpc.BidiStreamingServer[BytesMessage, BytesMessage]) error {
+	return status.Errorf(codes.Unimplemented, "method ForwardAgent not implemented")
+}
+func (UnimplementedSSHServer) testEmbeddedByValue() {}
+
+// UnsafeSSHServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to SSHServer will
+// result in compilation errors.
+type UnsafeSSHServer interface {
+	mustEmbedUnimplementedSSHServer()
+}
+
+func RegisterSSHServer(s grpc.ServiceRegistrar, srv SSHServer) {
+	// If the following call pancis, it indicates UnimplementedSSHServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&SSH_ServiceDesc, srv)
+}
+
+func _SSH_CheckAgent_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CheckAgentRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SSHServer).CheckAgent(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: SSH_CheckAgent_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SSHServer).CheckAgent(ctx, req.(*CheckAgentRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _SSH_ForwardAgent_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(SSHServer).ForwardAgent(&grpc.GenericServerStream[BytesMessage, BytesMessage]{ServerStream: stream})
+}
+
+// This type alias is provided for backwards compatibility with existing code that references the prior non-generic stream type by name.
+type SSH_ForwardAgentServer = grpc.BidiStreamingServer[BytesMessage, BytesMessage]
+
+// SSH_ServiceDesc is the grpc.ServiceDesc for SSH service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var SSH_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "moby.sshforward.v1.SSH",
+	HandlerType: (*SSHServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CheckAgent",
+			Handler:    _SSH_CheckAgent_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ForwardAgent",
+			Handler:       _SSH_ForwardAgent_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "ssh.proto",
+}