userspace: proxy: Introduce user worker to service IPC #22041

Job	Run time
LP64-WIP	4m 3s
manifest-check	3m 24s
build-windows (tgl tgl-h)	12m 17s
build-windows (imx8 imx8x imx8m imx8ulp)	13m 58s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	4m 15s
build-windows (mtl lnl)	12m 27s
build-windows (ptl)	11m 1s
build-linux (-d, mnfst, lnl)	4m 48s
build-linux (mnfst, ptl)	5m 50s
build-linux (zmain, mtl lnl)	3m 17s
build-linux (mnfst, tgl tgl-h)	5m 50s
build-linux (zmain, ptl)	3m 58s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 50s
build-windows (-d, lnl)	9m 5s
build-linux (zmain, tgl tgl-h)	4m 10s
build-linux (mnfst, mtl lnl)	6m 13s
build-linux (mnfst, --all)	18m 55s
compare-linux-win	30s
	2h 10m 51s

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