vendor: update buildkit to v0.18.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/moby/buildkit/session/filesync/diffcopy_unix.go

@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 package filesync
 

vendor/github.com/moby/buildkit/session/filesync/diffcopy_windows.go

@@ -1,5 +1,4 @@
 //go:build windows
-// +build windows
 
 package filesync
 

vendor/github.com/moby/buildkit/session/filesync/filesync.go

@@ -206,7 +206,7 @@ func FSSync(ctx context.Context, c session.Caller, opt FSSendRequestOpt) error {
 	opts[keyDirName] = []string{opt.Name}
 
 	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel(errors.WithStack(context.Canceled))
+	defer func() { cancel(errors.WithStack(context.Canceled)) }()
 
 	client := NewFileSyncClient(c.Conn())
 

vendor/github.com/moby/buildkit/session/group.go

@@ -74,7 +74,7 @@ func (sm *Manager) Any(ctx context.Context, g Group, f func(context.Context, str
 
 		timeoutCtx, cancel := context.WithCancelCause(ctx)
 		timeoutCtx, _ = context.WithTimeoutCause(timeoutCtx, 5*time.Second, errors.WithStack(context.DeadlineExceeded))
-		defer cancel(errors.WithStack(context.Canceled))
+		defer func() { cancel(errors.WithStack(context.Canceled)) }()
 		c, err := sm.Get(timeoutCtx, id, false)
 		if err != nil {
 			lastErr = err

vendor/github.com/moby/buildkit/session/manager.go

@@ -99,7 +99,7 @@ func (sm *Manager) HandleConn(ctx context.Context, conn net.Conn, opts map[strin
 // caller needs to take lock, this function will release it
 func (sm *Manager) handleConn(ctx context.Context, conn net.Conn, opts map[string][]string) error {
 	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel(errors.WithStack(context.Canceled))
+	defer func() { cancel(errors.WithStack(context.Canceled)) }()
 
 	opts = canonicalHeaders(opts)
 
@@ -154,7 +154,7 @@ func (sm *Manager) Get(ctx context.Context, id string, noWait bool) (Caller, err
 	}
 
 	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel(errors.WithStack(context.Canceled))
+	defer func() { cancel(errors.WithStack(context.Canceled)) }()
 
 	go func() {
 		<-ctx.Done()

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

@@ -96,7 +96,7 @@ func (s *Session) Run(ctx context.Context, dialer Dialer) error {
 	s.cancelCtx = cancel
 	s.done = make(chan struct{})
 
-	defer cancel(errors.WithStack(context.Canceled))
+	defer func() { cancel(errors.WithStack(context.Canceled)) }()
 	defer close(s.done)
 
 	meta := make(map[string][]string)

vendor/github.com/moby/buildkit/session/sshforward/sshprovider/agentprovider_unix.go

@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 package sshprovider
 

vendor/github.com/moby/buildkit/session/sshforward/sshprovider/agentprovider_windows.go

@@ -1,5 +1,4 @@
 //go:build windows
-// +build windows
 
 package sshprovider