NC | Add non current timestamp xattr support

[romayalon]

Describe the Problem

We need a new xattr that describes when the version became non current to be assigned on uploads (move to .versions/) and removed on deletions (promote to latest). The new xattr will be used as a hint for the nc lifecycle non current days rule.

Explain the Changes

1. assigned Date.now() to XATTR_NON_CURRENT_TIMESTASMP xattr on the following cases -
   a. _move_to_dest_version() - when moving latest version to version_path.
   b. _move_directory_content_xattr_to_versioned_file() - when moving directory object xattr to version file.
   c. _assign_versions_to_fs_xattr() - when version is a delete marker only.

2. Removed XATTR_NON_CURRENT_TIMESTASMP value from file on _promote_version_to_latest().

3. Updated test_bucketspace_versioning.js tests to test these cases as well.

Issues: Fixed #xxx / Gap #xxx

1. Gap - we should catch error on clear if ENODATA in general (not only for this change) - see comment https://github.com/noobaa/noobaa-core/pull/8964/files#r2051772675

Testing Instructions:

1. sudo NC_CORETEST=true node ./node_modules/mocha/bin/mocha src/test/unit_tests/test_bucketspace_versioning.js

• Doc added/updated
• Tests added

[nadavMiz]

LGTM

[nadavMiz]

I don't think there is a problem, but we should add concurrency tests just to be safe