userspace: proxy: fix multicore work queue handling #23972

Job	Run time
build-linux (mnfst, wcl imx95)	5m 46s
manifest-check	2m 52s
LP64-WIP	3m 34s
build-windows (mnfst, mtl)	9m 13s
build-windows (mnfst, tgl)	9m 22s
build-linux (mnfst, lnl)	4m 27s
build-linux (mnfst, imx8m imx8ulp)	4m 43s
build-linux (-d, mnfst, lnl)	4m 20s
build-windows (mnfst, imx8 imx8x)	8m 43s
build-linux (mnfst, imx8 imx8x)	4m 34s
build-windows (mnfst, tgl-h)	9m 8s
build-linux (mnfst, mtl)	4m 38s
build-linux (mnfst, tgl-h)	3m 59s
build-windows (-d, mnfst, lnl)	10m 1s
build-linux (mnfst, ptl)	5m 47s
build-windows (mnfst, ptl)	9m 22s
build-windows (mnfst, lnl)	8m 30s
build-linux (mnfst, tgl)	4m 3s
build-windows (mnfst, imx8m imx8ulp)	10m 25s
compare-linux-win	25s
	2h 3m 52s

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