Test user-space and enable CONFIG_USERSPACE on select platforms #20894

Job	Run time
LP64-WIP	3m 24s
build-windows (ptl)	6m 23s
manifest-check	56s
build-windows (tgl tgl-h)	7m 2s
build-windows (imx8 imx8x imx8m imx8ulp)	10m 3s
build-windows (mtl lnl)	7m 34s
build-linux (mnfst, mtl lnl)	5m 28s
build-linux (mnfst, ptl)	5m 19s
build-linux (zmain, ptl)	4m 5s
build-windows (-d, lnl)	6m 50s
build-linux (zmain, tgl tgl-h)	4m 59s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 0s
build-linux (-d, mnfst, lnl)	4m 16s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 10s
build-linux (mnfst, tgl tgl-h)	5m 2s
build-linux (mnfst, --all)	15m 11s
build-linux (zmain, mtl lnl)	5m 22s
compare-linux-win	35s
	1h 44m 39s

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