[backend] Add flag to enable ListObjects V1

[JaspreetSandhu]

What this PR does:

Enables ListObjects V1 calls to S3-compatible backends.

Which issue(s) this PR fixes:
Fixes #

Checklist

• Tests updated
• Documentation added
• CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

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[mdisibio]

Out of curiosity - what s3-compatible backend is this to support?

@zalegrala might be good to get your thoughts on this. I know that a lot of work has been done for performance in this area, i.e. polling up to 500K-1M blocks in one tenant. Don't think we would ever run this option ourselves, or be able to troubleshoot it in depth, but perhaps it if unlocks additional backends it could be useful to the community.