support cert c optional rule help generation #2957

Job	Run time
Prepare supported CodeQL environment matrix	5s
Run Guideline Recategorization tests	8s
Run release tests	8s
Run analysis report tests (2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4)	4m 31s
	4m 52s

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