CodeQL Unit Testing #3363

Job	Run time
Prepare CodeQL unit test matrix	4s
Run unit tests (cpp, 2.18.4, codeql-cli/v2.18.4, codeql-bundle-v2.18.4, ubuntu-latest-xl, codeql-...	1h 22m 10s
Run unit tests (c, 2.18.4, codeql-cli/v2.18.4, codeql-bundle-v2.18.4, ubuntu-latest-xl, codeql-cl...	31m 43s
Validate test results	8s
	1h 54m 5s

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