[bugfix] turboOCI commit with uuid

[WaberZhuang]

What this PR does / why we need it:
UUID is missed when using overlaybd-commit with the option --uuid and --turboOCI, instead of a random uuid in the committed file. After this fix, we can reproduce turboOCI files.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Please check the following list:

• Does the affected code have corresponding tests, e.g. unit test, E2E test?
• Does this change require a documentation update?
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have an appropriate license header?

[BigVan]

please add a UT to check the UUID if empty when creating a new LSMTFile

[WaberZhuang]

please add a UT to check the UUID if empty when creating a new LSMTFile

Added. With the unit tests, I checked the following cases:

• LSMTFile is created with a random non-empty UUID
• This UUID will be empty after committing without specifying CommitArgs.uuid
• This UUID will be a specific UUID after committing with specific CommitArgs.uuid

[BigVan]

LGTM