Merge pull request #4 from simonis/backports-for-jdk21.0.4 #24

Job	Run time
/compiler style,fullbuild,test JDK21	23m 50s
/compiler build,bootstraplite JDK21	4m 1s
/espresso style,fullbuild JDK21	12m 26s
/substratevm style,fullbuild JDK21	6m 29s
/substratevm build,helloworld,native_unittests JDK21	23m 23s
/substratevm build,debuginfotest JDK21	11m 3s
/substratevm hellomodule JDK21	4m 19s
/sulong style,fullbuild,sulongBasic JDK21	18m 45s
/truffle JDK21	11m 16s
/vm build,sulong JDK21	26m 0s
/vm build JDK21	15m 7s
	2h 36m 39s

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