Add "misra_help" query docs generator #4627

Job	Run time
Prepare CodeQL unit test matrix	9s
Run unit tests (cpp, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-...	2h 9m 22s
Run unit tests (c, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-cl...	43m 25s
Validate test results	5s
	2h 53m 1s

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