Disable metadata creation hack in repository service tests

This commit disables metadata force creation in repository service tests when it is ran with Praefect. This ensures any problems in Praefect are not hidden by the hack. Disabling the hack surfaces few behavior deviations with differing error messages.

The RenameRepository tests do not work with Praefect without the metadata creation hack. This is due to a bug in Praefect where the rename still gets applied even if the Gitalys failed the rename. As this is an existing bug, the test is skipped for now with a link to the tracking issue.

Related to: #4019 (closed)