Upgrade jetty to 12.0.12 #272

Job	Run time
platform build with JDK=temurin:17 on ppc64le	2h 48m 32s
platform build with JDK=temurin:17 on s390x	3h 22m 24s
integration-test with JDK=microsoft:17	17m 19s
test with JDK=microsoft:17	38m 40s
integration-test with JDK=temurin:17	16m 48s
test with JDK=temurin:17	38m 19s
	8h 2m 2s

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