userspace: Add userspace proxy #21188

Job	Run time
manifest-check	1m 0s
LP64-WIP	3m 37s
build-windows (ptl)	6m 49s
build-windows (mtl lnl)	7m 36s
build-linux (mnfst, tgl tgl-h)	5m 8s
build-windows (tgl tgl-h)	7m 13s
build-linux (mnfst, ptl)	4m 33s
build-linux (zmain, mtl lnl)	5m 53s
build-windows (imx8 imx8x imx8m imx8ulp)	9m 12s
build-linux (-d, mnfst, lnl)	4m 37s
build-linux (zmain, ptl)	4m 20s
build-linux (zmain, tgl tgl-h)	5m 19s
build-windows (-d, lnl)	6m 41s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 34s
build-linux (mnfst, --all)	16m 43s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 41s
build-linux (mnfst, mtl lnl)	5m 46s
compare-linux-win	40s
	1h 48m 22s

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