🎉 Source GitLab: allow all domains to be used as api_url

[Zirochkaa]

What

Closes #3265.

Pre-merge Checklist

• Grant edit access to maintainers (instructions)
• Secrets in the connector's spec are annotated with airbyte_secret
• Unit & integration tests added and passing. Community members, please provide proof of success locally e.g: screenshot or copy-paste unit, integration, and acceptance test output. To run acceptance tests for a Python connector, follow instructions in the README. For java connectors run ./gradlew :airbyte-integrations:connectors:<name>:integrationTest.
• Code reviews completed
• Documentation updated
  • Connector's README.md
  • Connector's bootstrap.md. See description and examples
  • Changelog updated in docs/integrations/<source or destination>/<name>.md including changelog. See changelog example
• PR name follows PR naming conventions
• Connector version bumped like described here

[Zirochkaa]

/test connector=source-gitlab

🕑 source-gitlab https://github.com/airbytehq/airbyte/actions/runs/1353251589
✅ source-gitlab https://github.com/airbytehq/airbyte/actions/runs/1353251589
Python tests coverage:

	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------
	 Name                                                 Stmts   Miss  Cover
	 ------------------------------------------------------------------------
	 source_acceptance_test/__init__.py                       2      0   100%
	 source_acceptance_test/base.py                          10      4    60%
	 source_acceptance_test/config.py                        74      8    89%
	 source_acceptance_test/conftest.py                     108    108     0%
	 source_acceptance_test/plugin.py                        47     47     0%
	 source_acceptance_test/tests/__init__.py                 4      0   100%
	 source_acceptance_test/tests/test_core.py              200     94    53%
	 source_acceptance_test/tests/test_full_refresh.py       18     11    39%
	 source_acceptance_test/tests/test_incremental.py        69     38    45%
	 source_acceptance_test/utils/__init__.py                 6      0   100%
	 source_acceptance_test/utils/asserts.py                 37      2    95%
	 source_acceptance_test/utils/common.py                  41     24    41%
	 source_acceptance_test/utils/compare.py                 47     20    57%
	 source_acceptance_test/utils/connector_runner.py        82     49    40%
	 source_acceptance_test/utils/json_schema_helper.py     115     14    88%
	 ------------------------------------------------------------------------
	 TOTAL                                                  860    419    51%
	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------
	 Name                        Stmts   Miss  Cover
	 ---------- coverage: platform linux, python 3.8.10-final-0 -----------/actions-runner/_work/airbyte/airbyte/airbyte-integrations/connectors/source-gitlab/.venv/lib/python3.8/site-packages/coverage/control.py:761: CoverageWarning: No data was collected. (no-data-collected)
	 -----------------------------------------------
	   self._warn("No data was collected.", slug="no-data-collected")
	 source_gitlab/__init__.py       2      2     0%
	 source_gitlab/source.py        36     36     0%
	 source_gitlab/streams.py      220    220     0%
	 -----------------------------------------------
	 TOTAL                         258    258     0%

[Zirochkaa]

/publish connector=connectors/source-gitlab

🕑 connectors/source-gitlab https://github.com/airbytehq/airbyte/actions/runs/1354793564
✅ connectors/source-gitlab https://github.com/airbytehq/airbyte/actions/runs/1354793564