[feat] Preserve version supplied by client (#9854)

Just like GET/DELETE APIs it is possible to preserve
client supplied versionId's, of course the versionIds
have to be uuid, if an existing versionId is found
it is overwritten if no object locking policies
are found.

- PUT /bucketname/objectname?versionId=<id>
- POST /bucketname/objectname?uploads=&versionId=<id>
- PUT /bucketname/objectname?verisonId=<id> (with x-amz-copy-source)

cmd/xl-storage-format-v2.go

@@ -237,14 +237,16 @@ func (z *xlMetaV2) AddVersion(fi FileInfo) error {
 		return nil
 	}
 
-	var uv uuid.UUID
-	var err error
-	// null version Id means empty version Id.
-	if fi.VersionID == nullVersionID {
-		fi.VersionID = ""
+	if fi.VersionID == "" {
+		// this means versioning is not yet
+		// enabled i.e all versions are basically
+		// default value i.e "null"
+		fi.VersionID = nullVersionID
 	}
 
-	if fi.VersionID != "" {
+	var uv uuid.UUID
+	var err error
+	if fi.VersionID != "" && fi.VersionID != nullVersionID {
 		uv, err = uuid.Parse(fi.VersionID)
 		if err != nil {
 			return err