vendor: update buildkit to v0.14.0-rc1

Update buildkit dependency to v0.14.0-rc1. Update the tracing
infrastructure to use the new detect API which updates how the delegated
exporter is configured.

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

vendor/github.com/moby/buildkit/util/testutil/integration/run.go

@@ -21,6 +21,7 @@ import (
 	"github.com/moby/buildkit/util/appcontext"
 	"github.com/moby/buildkit/util/contentutil"
 	ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
+	"github.com/pkg/errors"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/sync/semaphore"
 )
@@ -197,6 +198,9 @@ func Run(t *testing.T, testCases []Test, opt ...TestOpt) {
 						require.NoError(t, sandboxLimiter.Acquire(context.TODO(), 1))
 						defer sandboxLimiter.Release(1)
 
+						ctx, cancel := context.WithCancelCause(ctx)
+						defer cancel(errors.WithStack(context.Canceled))
+
 						sb, closer, err := newSandbox(ctx, br, mirror, mv)
 						require.NoError(t, err)
 						t.Cleanup(func() { _ = closer() })