Increment version to 2.12.0-SNAPSHOT #2563

Job	Run time
test-and-build (11, ubuntu-latest, ism)	54s
test-and-build (11, ubuntu-latest, ism)	23m 37s
test-and-build (11, ubuntu-latest, non-ism)	1m 5s
test-and-build (11, ubuntu-latest, non-ism)	14m 9s
test-and-build (11, windows-latest, ism)	5m 42s
test-and-build (11, windows-latest, ism)	5m 42s
test-and-build (11, windows-latest, non-ism)	5m 59s
test-and-build (11, windows-latest, non-ism)	5m 59s
test-and-build (11, macos-latest, ism)	6m 52s
test-and-build (11, macos-latest, ism)	6m 52s
test-and-build (11, macos-latest, non-ism)	4m 33s
test-and-build (11, macos-latest, non-ism)	4m 33s
test-and-build (17, ubuntu-latest, ism)	1m 2s
test-and-build (17, ubuntu-latest, ism)	25m 12s
test-and-build (17, ubuntu-latest, non-ism)	1m 1s
test-and-build (17, ubuntu-latest, non-ism)	14m 6s
test-and-build (17, windows-latest, ism)	6m 2s
test-and-build (17, windows-latest, ism)	6m 2s
test-and-build (17, windows-latest, non-ism)	5m 27s
test-and-build (17, windows-latest, non-ism)	5m 27s
test-and-build (17, macos-latest, ism)	5m 12s
test-and-build (17, macos-latest, ism)	5m 12s
test-and-build (17, macos-latest, non-ism)	6m 10s
test-and-build (17, macos-latest, non-ism)	6m 10s
	2h 53m 0s

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