opslevel_service_tag accepts service or service_alias, not both, test…

[davidbloss]

Resolves # Add missing tests (partially)

Problem

Add integration tests for:

• [x] opslevel_service_dependency
• [x] opslevel_service_repository
• [x] opslevel_service_tag

Solution

Checklist

• [ ] I have run this code, and it appears to resolve the stated issue.
• [ ] This PR does not reduce total test coverage
• [ ] This PR has no user interface changes or has already received approval from product management to change the interface.
• [ ] Make a changie entry that explains the customer facing outcome of this change

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 0.23%. Comparing base (61316c4) to head (9a30824). Report is 27 commits behind head on main.

Files	Patch %	Lines
opslevel/resource_opslevel_service_tag.go	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #454 +/- ## ======================================== - Coverage 0.25% 0.23% -0.02% ======================================== Files 78 81 +3 Lines 8676 9191 +515 ======================================== Hits 22 22 - Misses 8651 9166 +515 Partials 3 3 ```

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