[JDK-8345672] Adapt JDK-8344168: Change Unsafe base offset from int to long #21071

Job	Run time
/substratevm on Windows	4m 57s
/compiler style,fullbuild,test JDKlatest	20m 56s
/compiler build,bootstraplite JDKlatest	4m 4s
/espresso style,fullbuild JDK21	13m 8s
/substratevm style,fullbuild JDKlatest	11m 17s
/substratevm build,helloworld,native_unittests JDKlatest	3m 53s
/substratevm build,debuginfotest JDKlatest	4m 11s
/substratevm hellomodule JDKlatest	3m 54s
/sulong style,fullbuild,sulongBasic JDK21	20m 10s
/truffle JDK21	30m 8s
/vm build,sulong JDKlatest	5m 39s
/vm build JDKlatest	5m 35s
	2h 7m 52s

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