[OO] Major performance improvements & fixes #20371

Job	Run time
Database tests	2m 37s
CHANGELOG.md	8s
Checkstyle	2m 12s
CHANGELOG.md - only unreleased touched	15s
GUI tests	1m 59s
Markdown	5s
Modernizer	1m 14s
Unit tests	7m 16s
OpenRewrite	2m 38s
Code coverage	31s
Validate Gradle Wrapper	5s
Find merge conflicts	6s
Source branch is other than "main"	1s
Validate requirement coverage	32s
upload-pr-number	3s
	19m 42s

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