Add tests for custom attributes attached to async Test and UnityTest

[nowsprinting]

• Fix recommendations from the inspection
• Add test on attributes attached to async Test and UnityTest

[github-actions]

Code Metrics Report

	master (d3e274e)	#14 (1a2f2ef)	+/-
Coverage	47.6%	47.6%	0.0%
Code to Test Ratio	1:0.8	1:0.9	+0.1
Test Execution Time	4m5s	5m11s	+1m6s

Details

  |                     | master (d3e274e) | #14 (1a2f2ef) |  +/-  |
  |---------------------|------------------|---------------|-------|
  | Coverage            |            47.6% |         47.6% |  0.0% |
  |   Files             |               14 |            14 |     0 |
  |   Lines             |              330 |           330 |     0 |
  |   Covered           |              157 |           157 |     0 |
+ | Code to Test Ratio  |            1:0.8 |         1:0.9 |  +0.1 |
  |   Code              |              614 |           614 |     0 |
+ |   Test              |              487 |           537 |   +50 |
- | Test Execution Time |             4m5s |         5m11s | +1m6s |

Code coverage of files in pull request scope (22.1% → 22.1%)

Files	Coverage	+/-
Runtime/Attributes/FocusGameViewAttribute.cs	100.0%	0.0%
Runtime/Attributes/GameViewResolutionAttribute.cs	15.2%	0.0%
Runtime/Attributes/IgnoreBatchModeAttribute.cs	0.0%	0.0%
Runtime/Attributes/IgnoreWindowModeAttribute.cs	9.1%	0.0%

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Reported by octocov