Implement package preprocessor2 #4295

Job	Run time
Prepare CodeQL unit test matrix	5s
Run unit tests (c, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-cl...	39m 26s
Run unit tests (cpp, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-...	1h 59m 7s
Validate test results	5s
	2h 38m 43s

Provide feedback