userspace: dp: Add support for userspace DP thread #21303

Job	Run time
manifest-check	1m 6s
LP64-WIP	3m 39s
build-windows (imx8 imx8x imx8m imx8ulp)	9m 34s
build-windows (mtl lnl)	5m 51s
build-windows (tgl tgl-h)	7m 54s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 37s
build-windows (ptl)	6m 17s
build-windows (-d, lnl)	6m 16s
build-linux (mnfst, mtl lnl)	3m 20s
build-linux (mnfst, tgl tgl-h)	5m 21s
build-linux (-d, mnfst, lnl)	3m 24s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	7m 7s
build-linux (zmain, mtl lnl)	4m 33s
build-linux (mnfst, --all)	5m 51s
build-linux (zmain, ptl)	3m 40s
build-linux (zmain, tgl tgl-h)	5m 33s
build-linux (mnfst, ptl)	3m 19s
compare-linux-win	42s
	1h 30m 4s

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