[GR-69295] Ensure that code base is determined after initializing heap base. #25088

Job	Run time
/substratevm on Windows	9m 33s
/substratevm build,helloworld,native_unittests,standalone_pointsto_unittests JDKlatest	22m 46s
/compiler build,bootstraplite JDKlatest	4m 34s
/substratevm style,fullbuild JDKlatest	9m 14s
/substratevm build,debuginfotest JDKlatest	24m 17s
/vm build,sulong JDKlatest	29m 3s
/vm build JDKlatest	12m 45s
/truffle style,fullbuild,fulltest JDK21	31m 1s
/substratevm hellomodule JDKlatest	5m 26s
/sulong style,fullbuild,sulongBasic JDK21	17m 38s
/compiler style,fullbuild,test JDKlatest	37m 51s
/espresso style,fullbuild JDKlatest	11m 12s
	3h 35m 20s

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