Fixed: Allow to disable owner references for cross namespace access with builder and function namespace (#3024)

* Add DISABLE_OWNER_REFERENCES env variable to executor and buildermgr deployment.
Use this env var to decide adding ownerReferences to K8s resources created by fission CRD.
* Resolve review comments
* Fix lint failure

---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/utils/utils.go

@@ -39,6 +39,10 @@ import (
 	"github.com/fission/fission/pkg/utils/uuid"
 )
 
+const (
+	ENV_DISABLE_OWNER_REFERENCES string = "DISABLE_OWNER_REFERENCES"
+)
+
 func UrlForFunction(name, namespace string) string {
 	prefix := "/fission-function"
 	if namespace != metav1.NamespaceDefault {
@@ -296,3 +300,8 @@ func DeleteOldPackages(pkgPath, pkgType string) error {
 
 	return nil
 }
+
+func IsOwnerReferencesEnabled() bool {
+	disableOwnerReference, _ := strconv.ParseBool(os.Getenv(ENV_DISABLE_OWNER_REFERENCES))
+	return !disableOwnerReference
+}