ipc4: Add notification pool #705

Job	Run time
manifest-check	58s
LP64-WIP	3m 59s
build-windows (tgl tgl-h)	7m 11s
build-windows (ptl)	5m 58s
build-windows (imx8 imx8x imx8m imx8ulp)	8m 20s
build-windows (-d, lnl)	6m 33s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 29s
build-linux (zmain, ptl)	4m 31s
build-linux (mnfst, ptl)	4m 32s
build-linux (mnfst, mtl lnl)	7m 0s
build-windows (mtl lnl)	7m 39s
build-linux (-d, mnfst, lnl)	5m 2s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 57s
build-linux (mnfst, --all)	15m 6s
build-linux (zmain, mtl lnl)	6m 5s
build-linux (mnfst, tgl tgl-h)	5m 21s
build-linux (zmain, tgl tgl-h)	5m 48s
compare-linux-win	36s
	1h 48m 5s

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