Revert "Release v2.55.0" #4345

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...	41m 15s
Run unit tests (cpp, 2.21.4, codeql-cli/v2.21.4, codeql-bundle-v2.21.4, ubuntu-latest-xl, codeql-...	2h 10m 25s
Validate test results	7s
	2h 51m 52s

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