CLDSRV-501 [7.70] PutMetadata should write metadata on top of a null version

[nicolas2bert]

• Handles isNull master version with no versionId
• Supports nullVersionCompatMode for using the old and new null keys logic (S3C-7352)
• Test https://github.com/scality/Arsenal/pull/2216 once tests are forwardported.

[bert-e]

Hello nicolas2bert,

My role is to assist you with the merge of this pull request. Please type @bert-e help to get information on this process, or consult the user documentation.

Status report is not available.

[bert-e]

Incorrect fix version

The Fix Version/s in issue CLDSRV-501 contains:

• None

Considering where you are trying to merge, I ignored possible hotfix versions and I expected to find:

• 7.70.44

• 8.6.25

• 8.7.45

• 8.8.18

Please check the Fix Version/s of CLDSRV-501, or the target branch of this pull request.