Introduce `Preprocessor` #11907

Job	Run time
lint	11m 16s
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	21m 21s
flaky-tests	14m 19s
build-macos-latest-jdk-21	1h 1m 41s
site	8m 54s
build-windows-latest-jdk-21	1h 11m 57s
build-ubicloud-standard-16-jdk-8	14m 21s
build-ubicloud-standard-16-jdk-11	15m 7s
build-ubicloud-standard-16-jdk-17-leak	17m 53s
build-ubicloud-standard-16-jdk-17-min-java-11	17m 29s
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	19m 44s
	4h 34m 2s

Provide feedback