build: support local state group

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

bake/bake.go

@@ -21,7 +21,6 @@ import (
 	"github.com/docker/cli/cli/config"
 	hcl "github.com/hashicorp/hcl/v2"
 	"github.com/moby/buildkit/client/llb"
-	"github.com/moby/buildkit/identity"
 	"github.com/moby/buildkit/session/auth/authprovider"
 	"github.com/pkg/errors"
 	"github.com/zclconf/go-cty/cty"
@@ -1104,7 +1103,6 @@ func toBuildOpt(t *Target, inp *Input) (*build.Options, error) {
 
 	bo := &build.Options{
 		Inputs:        bi,
-		Ref:           identity.NewID(),
 		Tags:          t.Tags,
 		BuildArgs:     args,
 		Labels:        labels,