Removal of Mercury and Numeric version schemes, refactoring #2043

Job	Run time
Verify / setup-maven-version	2s
Verify / ubuntu-latest jdk-17-zulu 3.9.9	9s
Verify / format('{0} jdk-{1}-{2} {3}', matrix.os, matrix.jdk, matrix.distribution, matrix.maven)	0s
	11s

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