tree-wide: remove legacy platform_shared_get() #23748

Job	Run time
LP64-WIP	3m 25s
build-windows (mnfst, lnl)	8m 37s
build-windows (mnfst, tgl-h)	8m 53s
build-windows (mnfst, imx8m imx8ulp)	8m 53s
build-linux (mnfst, ptl)	5m 33s
build-linux (mnfst, imx8 imx8x)	4m 33s
build-windows (mnfst, ptl)	8m 26s
manifest-check	2m 54s
build-linux (mnfst, mtl)	4m 9s
build-linux (mnfst, wcl imx95)	5m 59s
build-windows (-d, mnfst, lnl)	9m 1s
build-linux (mnfst, tgl-h)	3m 51s
build-linux (mnfst, lnl)	3m 52s
build-linux (-d, mnfst, lnl)	4m 6s
build-linux (mnfst, imx8m imx8ulp)	4m 19s
build-linux (mnfst, tgl)	4m 1s
build-windows (mnfst, mtl)	9m 3s
build-windows (mnfst, tgl)	8m 26s
build-windows (mnfst, imx8 imx8x)	9m 23s
compare-linux-win	29s
	1h 57m 53s

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