[v9]: Replace custom Platform & PlatformChecker with package platform #5533

Job	Run time
macos \| stable	1m 22s
cancel-previous-workflow	3s
macos \| beta	1m 51s
ubuntu \| stable	1m 32s
ubuntu \| beta	1m 38s
windows \| stable	2m 10s
windows \| beta	1m 49s
analyze / analyze	43s
analyze / cancel-previous-workflow	4s
analyze / package-analysis	1m 26s
	12m 38s

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