userspace: dp: Add support for userspace DP thread #21259

Job	Run time
LP64-WIP	3m 51s
build-windows (imx8 imx8x imx8m imx8ulp)	9m 49s
manifest-check	1m 12s
build-windows (ptl)	6m 56s
build-linux (mnfst, mtl lnl)	5m 42s
build-windows (mtl lnl)	8m 53s
build-windows (-d, lnl)	8m 41s
build-windows (tgl tgl-h)	8m 46s
build-linux (zmain, tgl tgl-h)	5m 39s
build-linux (mnfst, ptl)	5m 27s
build-linux (-d, mnfst, lnl)	4m 35s
build-linux (mnfst, tgl tgl-h)	5m 30s
build-linux (mnfst, --all)	16m 48s
build-linux (zmain, ptl)	4m 43s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	7m 34s
build-linux (zmain, mtl lnl)	5m 46s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	7m 28s
compare-linux-win	41s
	1h 58m 1s

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