Fixing create_object_upload for namespace buckets

[jackyalbo]

Explain the changes

1. We have an issue with multipart upload on Azure namespace. It uses create_object_upload in case we want to save the user's metadata of the blob, as we are doing that only after the file is completed.
   in create_object_upload we were taking for granted that the bucket will have tiering info, which is not true in the case of using namespace.

Issues: Fixed #xxx / Gap #xxx

1. Fixed https://bugzilla.redhat.com/show_bug.cgi?id=2211704

Testing Instructions:

1. try to upload a file using s3 client with md

• Doc added/updated
• Tests added