fix: azure list multipart uploads test failures

The latest azurite made a change where the blob metadata must be
explicitly requested when calling NewListBlobsFlatPager(). We were
taking action on metadata iteams, and the tests were failing due
to these always missing without requesting metadata to be included
in the response.

Fix is to enable metadata for the response.

backend/azure/azure.go

@@ -1036,7 +1036,8 @@ func (az *Azure) ListMultipartUploads(ctx context.Context, input *s3.ListMultipa
 	prefix := string(metaTmpMultipartPrefix)
 
 	pager := client.NewListBlobsFlatPager(&container.ListBlobsFlatOptions{
-		Prefix: &prefix,
+		Include: container.ListBlobsInclude{Metadata: true},
+		Prefix:  &prefix,
 	})
 
 	for pager.More() {