Enhance CERT rules with priority and level tags #3601

Job	Run time
Prepare CodeQL unit test matrix	5s
Run unit tests (c, 2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4, ubuntu-latest-xl, codeql-cl...	37m 21s
Run unit tests (cpp, 2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4, ubuntu-latest-xl, codeql-...	1h 38m 11s
Validate test results	6s
	2h 15m 43s

Provide feedback