ENH: Allow kwargs for Entity.update in Entity.update_acl

Summary

For https://gitlab.indiscale.com/caosdb/customers/geomar/management/-/issues/255, implements https://gitlab.com/linkahead/linkahead-pylib/-/issues/112. Simply allow to pass through **kwargs to the underlying Entity.update() call, thus allowing a unique=False.

Focus

**kwargs are just passed through. Also look at the new docstring.

Test Environment

Integration tests in caosdb-pyinttest!77.

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