Fix in_commit_timestamp_enablement

[DrakeLin]

Please describe why this is necessary.

The in_commit_timestamp_enablement() method returns errors when ICT is enabled but enablement properties are missing, violating the Delta protocol.

If the table has commits from a period when this feature was not enabled, provenance information around when this feature was enabled must be tracked in table properties:

The property delta.inCommitTimestampEnablementVersion must be used to track the version of the table when this feature was enabled.
The property delta.inCommitTimestampEnablementTimestamp must be the same as the inCommitTimestamp of the commit when this feature was enabled.

Describe the functionality you are proposing.

Fix enablement functions and tests

Additional context

No response

[OussamaSaoudi]

Use fixes: #123 or resolves #123 so that github auto-resolves the issue :)