[v9]: Replace custom Platform & PlatformChecker with package platform #1853

Job	Run time
macos \| stable	1m 34s
cancel-previous-workflow	2s
macos \| beta	1m 14s
linux \| stable	1m 36s
linux \| beta	1m 32s
windows \| stable	4m 1s
windows \| beta	3m 23s
analyze / analyze	1m 18s
analyze / cancel-previous-workflow	3s
analyze / package-analysis	1m 34s
	16m 17s

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