store S3 storage class in extended atrributes #7961 (#7962)

* store S3 storage class in extended atrributes #7961

* canonical

* remove issue reference

---------

Co-authored-by: Robert Schade <robert.schade@uni-paderborn.de>
Co-authored-by: Chris Lu <chris.lu@gmail.com>

weed/s3api/s3err/s3api_errors.go

@@ -141,6 +141,7 @@ const (
 
 	// Bucket encryption errors
 	ErrNoSuchBucketEncryptionConfiguration
+	ErrInvalidStorageClass
 )
 
 // Error message constants for checksum validation
@@ -588,6 +589,11 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "The server side encryption configuration was not found.",
 		HTTPStatusCode: http.StatusNotFound,
 	},
+	ErrInvalidStorageClass: {
+		Code:           "InvalidStorageClass",
+		Description:    "The storage class you specified is not valid",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 }
 
 // GetAPIError provides API Error for input API error code.