[GR-55688] [GR-60181] Optimize DynamicObjectLibrary.removeKey. #21027

Job	Run time
/substratevm on Windows	8m 7s
/compiler style,fullbuild,test JDKlatest	29m 53s
/compiler build,bootstraplite JDKlatest	4m 26s
/espresso style,fullbuild JDK21	13m 38s
/substratevm style,fullbuild JDKlatest	11m 50s
/substratevm build,helloworld,native_unittests JDKlatest	20m 3s
/substratevm build,debuginfotest JDKlatest	23m 46s
/substratevm hellomodule JDKlatest	5m 6s
/sulong style,fullbuild,sulongBasic JDK21	21m 8s
/truffle JDK21	32m 36s
/vm build,sulong JDKlatest	26m 36s
/vm build JDKlatest	15m 57s
	3h 33m 6s

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