support cert c optional rule help generation #2975

Job	Run time
Run release tests	11s
Prepare supported CodeQL environment matrix	5s
Run Guideline Recategorization tests	7s
Run analysis report tests (2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4)	4m 34s
	4m 57s

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