Update logback-classic, logback-core to 1.5.12 #7084

Job	Run time
format-check	3m 57s
scaladoc-check	2m 54s
compiler-warnings	2m 17s
build-mdbook	5s
docker-tests	21m 28s
integration-tests (ubuntu-latest, oopsla19)	23m 42s
unit-tests (ubuntu-latest)	5m 45s
integration-tests (ubuntu-latest, arrays)	10m 34s
unit-tests (macos-latest)	5m 19s
integration-tests (macos-latest, oopsla19)	22m 2s
	1h 38m 3s

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