ipc: Fix ipc_msg_send() with payload already prepared #22958

Job	Run time
manifest-check	2m 46s
LP64-WIP	4m 0s
build-windows (mnfst, mtl)	9m 30s
build-windows (mnfst, ptl)	10m 45s
build-windows (mnfst, imx8 imx8x)	14m 10s
build-windows (mnfst, imx8m imx8ulp)	9m 49s
build-windows (mnfst, tgl)	8m 21s
build-windows (mnfst, lnl)	9m 0s
build-linux (mnfst, lnl)	4m 26s
build-linux (mnfst, tgl)	4m 17s
build-windows (mnfst, tgl-h)	8m 31s
build-linux (mnfst, imx8m imx8ulp)	5m 6s
build-linux (mnfst, mtl)	4m 32s
build-linux (-d, mnfst, lnl)	4m 26s
build-windows (-d, mnfst, lnl)	9m 15s
build-linux (mnfst, imx8 imx8x)	5m 0s
build-linux (mnfst, ptl)	5m 52s
build-linux (mnfst, wcl imx95)	7m 21s
build-linux (mnfst, tgl-h)	5m 6s
compare-linux-win	33s
	2h 12m 46s

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