[GR-60376] Resolve launcher executable path on Windows too #20442

Job	Run time
/substratevm on Windows	8m 34s
/compiler style,fullbuild,test JDK21	31m 25s
/compiler build,bootstraplite JDKlatest	4m 58s
/espresso style,fullbuild JDK21	14m 11s
/substratevm style,fullbuild JDK21	11m 41s
/substratevm build,helloworld,native_unittests JDKlatest	20m 3s
/substratevm build,debuginfotest JDKlatest	22m 21s
/substratevm hellomodule JDKlatest	5m 15s
/sulong style,fullbuild,sulongBasic JDK21	21m 15s
/truffle JDK21	34m 15s
/vm build,sulong JDKlatest	26m 25s
/vm build JDKlatest	16m 53s
	3h 37m 16s

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