[GR-61481] Fix tier_count values in CPU sampler JSON output. #20949

Job	Run time
/substratevm on Windows	8m 21s
/compiler style,fullbuild,test JDK21	31m 43s
/compiler build,bootstraplite JDKlatest	4m 11s
/espresso style,fullbuild JDK21	12m 55s
/substratevm style,fullbuild JDK21	11m 45s
/substratevm build,helloworld,native_unittests JDKlatest	20m 35s
/substratevm build,debuginfotest JDKlatest	22m 21s
/substratevm hellomodule JDKlatest	4m 40s
/sulong style,fullbuild,sulongBasic JDK21	20m 30s
/truffle JDK21	33m 7s
/vm build,sulong JDKlatest	26m 36s
/vm build JDKlatest	15m 55s
	3h 32m 39s

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