vendor: update buildkit to v0.20.0-rc2

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

vendor/github.com/moby/buildkit/util/appdefaults/appdefaults_windows.go

@@ -18,7 +18,7 @@ var (
 
 var (
 	UserCNIConfigPath = DefaultCNIConfigPath
-	CDISpecDirs       []string
+	CDISpecDirs       = []string{filepath.Join(os.Getenv("ProgramData"), "buildkitd", "cdi")}
 )
 
 func UserAddress() string {

vendor/github.com/moby/buildkit/util/testutil/workers/dockerd.go

@@ -41,6 +41,7 @@ func InitDockerdWorker() {
 			FeatureSBOM,
 			FeatureSecurityMode,
 			FeatureCNINetwork,
+			FeatureCDI,
 		},
 	})
 	integration.Register(&Moby{
@@ -51,6 +52,7 @@ func InitDockerdWorker() {
 			FeatureSecurityMode,
 			FeatureCNINetwork,
 			FeatureContentCheck,
+			FeatureCDI,
 		},
 	})
 }

vendor/github.com/moby/buildkit/util/testutil/workers/features.go

@@ -31,6 +31,7 @@ const (
 	FeatureSourceDateEpoch      = "source_date_epoch"
 	FeatureCNINetwork           = "cni_network"
 	FeatureContentCheck         = "content_check"
+	FeatureCDI                  = "cdi"
 )
 
 var features = map[string]struct{}{
@@ -58,6 +59,7 @@ var features = map[string]struct{}{
 	FeatureSourceDateEpoch:      {},
 	FeatureCNINetwork:           {},
 	FeatureContentCheck:         {},
+	FeatureCDI:                  {},
 }
 
 func CheckFeatureCompat(t *testing.T, sb integration.Sandbox, reason ...string) {