fix: update getVersioningState to signal non-existent buckets with Er… (#7613)

* fix: update getVersioningState to signal non-existent buckets with ErrNotFound

This change modifies the getVersioningState function to return filer_pb.ErrNotFound when a requested bucket does not exist, allowing callers to handle the situation appropriately, such as auto-creating the bucket in PUT handlers. This improves error handling and clarity in the API's behavior regarding bucket existence.

* Update weed/s3api/s3api_bucket_config.go

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: 洪晓威 <xiaoweihong@deepglint.com>
Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

weed/s3api/s3api_bucket_config.go

@@ -519,7 +519,9 @@ func (s3a *S3ApiServer) getVersioningState(bucket string) (string, error) {
 	config, errCode := s3a.getBucketConfig(bucket)
 	if errCode != s3err.ErrNone {
 		if errCode == s3err.ErrNoSuchBucket {
-			return "", nil
+			// Signal to callers that the bucket does not exist so they can
+			// decide whether to auto-create it (e.g., in PUT handlers).
+			return "", filer_pb.ErrNotFound
 		}
 		glog.Errorf("getVersioningState: failed to get bucket config for %s: %v", bucket, errCode)
 		return "", fmt.Errorf("failed to get bucket config: %v", errCode)