fuzzing: small improvements for ipc3 and ipc4 #23255

Job	Run time
LP64-WIP	3m 50s
build-windows (mnfst, imx8m imx8ulp)	11m 18s
build-windows (mnfst, mtl)	9m 18s
build-linux (mnfst, tgl)	4m 25s
manifest-check	2m 46s
build-windows (-d, mnfst, lnl)	12m 4s
build-linux (mnfst, lnl)	4m 44s
build-linux (mnfst, mtl)	4m 15s
build-windows (mnfst, imx8 imx8x)	9m 50s
build-linux (mnfst, imx8 imx8x)	4m 57s
build-linux (-d, mnfst, lnl)	4m 37s
build-linux (mnfst, tgl-h)	4m 30s
build-windows (mnfst, tgl)	8m 30s
build-linux (mnfst, imx8m imx8ulp)	5m 12s
build-windows (mnfst, tgl-h)	8m 39s
build-linux (mnfst, wcl imx95)	7m 28s
build-windows (mnfst, ptl)	9m 54s
build-windows (mnfst, lnl)	8m 7s
build-linux (mnfst, ptl)	5m 58s
compare-linux-win	31s
	2h 10m 53s

Provide feedback