[JDK-8345672] Adapt JDK-8344168: Change Unsafe base offset from int to long #21068

Job	Run time
/substratevm on Windows	4m 59s
/compiler style,fullbuild,test JDKlatest	16m 18s
/compiler build,bootstraplite JDKlatest	4m 7s
/espresso style,fullbuild JDK21	13m 3s
/substratevm style,fullbuild JDKlatest	11m 28s
/substratevm build,helloworld,native_unittests JDKlatest	3m 52s
/substratevm build,debuginfotest JDKlatest	4m 20s
/substratevm hellomodule JDKlatest	4m 8s
/sulong style,fullbuild,sulongBasic JDK21	16m 17s
/truffle JDK21	16m 17s
/vm build,sulong JDKlatest	5m 29s
/vm build JDKlatest	5m 36s
	1h 45m 54s

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