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/google.golang.org/protobuf/reflect/protoreflect/proto.go

@@ -161,7 +161,7 @@ const (
 // IsValid reports whether the syntax is valid.
 func (s Syntax) IsValid() bool {
 	switch s {
-	case Proto2, Proto3:
+	case Proto2, Proto3, Editions:
 		return true
 	default:
 		return false

vendor/google.golang.org/protobuf/reflect/protoreflect/source_gen.go

@@ -373,6 +373,8 @@ func (p *SourcePath) appendFieldOptions(b []byte) []byte {
 		b = p.appendRepeatedField(b, "edition_defaults", (*SourcePath).appendFieldOptions_EditionDefault)
 	case 21:
 		b = p.appendSingularField(b, "features", (*SourcePath).appendFeatureSet)
+	case 22:
+		b = p.appendSingularField(b, "feature_support", (*SourcePath).appendFieldOptions_FeatureSupport)
 	case 999:
 		b = p.appendRepeatedField(b, "uninterpreted_option", (*SourcePath).appendUninterpretedOption)
 	}
@@ -519,6 +521,23 @@ func (p *SourcePath) appendFieldOptions_EditionDefault(b []byte) []byte {
 	return b
 }
 
+func (p *SourcePath) appendFieldOptions_FeatureSupport(b []byte) []byte {
+	if len(*p) == 0 {
+		return b
+	}
+	switch (*p)[0] {
+	case 1:
+		b = p.appendSingularField(b, "edition_introduced", nil)
+	case 2:
+		b = p.appendSingularField(b, "edition_deprecated", nil)
+	case 3:
+		b = p.appendSingularField(b, "deprecation_warning", nil)
+	case 4:
+		b = p.appendSingularField(b, "edition_removed", nil)
+	}
+	return b
+}
+
 func (p *SourcePath) appendUninterpretedOption_NamePart(b []byte) []byte {
 	if len(*p) == 0 {
 		return b

vendor/google.golang.org/protobuf/reflect/protoreflect/type.go

@@ -544,6 +544,12 @@ type EnumDescriptor interface {
 	// ReservedRanges is a list of reserved ranges of enum numbers.
 	ReservedRanges() EnumRanges
 
+	// IsClosed reports whether this enum uses closed semantics.
+	// See https://protobuf.dev/programming-guides/enum/#definitions.
+	// Note: the Go protobuf implementation is not spec compliant and treats
+	// all enums as open enums.
+	IsClosed() bool
+
 	isEnumDescriptor
 }
 type isEnumDescriptor interface{ ProtoType(EnumDescriptor) }