[JDK-8345672] Adapt JDK-8344168: Change Unsafe base offset from int to long #21069

Job	Run time
/substratevm on Windows	5m 9s
/compiler style,fullbuild,test JDKlatest	19m 50s
/compiler build,bootstraplite JDKlatest	4m 8s
/espresso style,fullbuild JDK21	13m 46s
/substratevm style,fullbuild JDKlatest	11m 33s
/substratevm build,helloworld,native_unittests JDKlatest	4m 6s
/substratevm build,debuginfotest JDKlatest	4m 19s
/substratevm hellomodule JDKlatest	4m 32s
/sulong style,fullbuild,sulongBasic JDK21	19m 48s
/truffle JDK21	19m 50s
/vm build,sulong JDKlatest	5m 43s
/vm build JDKlatest	5m 39s
	1h 58m 23s

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