Implement package preprocessor2 #4236

Job	Run time
Prepare CodeQL unit test matrix	7s
Run unit tests (cpp, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-...	1h 58m 3s
Run unit tests (c, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-cl...	39m 5s
Validate test results	5s
	2h 37m 20s

Provide feedback