demux: Support inactive cross-pipeline sinks #72

Job	Run time
build-windows (imx8 imx8x imx8m)	7m 30s
build-linux (mnfst, imx8 imx8x imx8m)	4m 40s
build-windows (mtl)	7m 51s
LP64-WIP	3m 27s
build-linux (mnfst, mtl)	4m 21s
build-windows (tgl tgl-h)	8m 26s
manifest-check	39s
build-linux (mnfst, lnl)	4m 11s
build-windows (-d, mtl)	8m 49s
build-linux (mnfst, tgl tgl-h)	5m 23s
build-linux (zmain, imx8 imx8x imx8m)	4m 8s
build-linux (zmain, mtl)	4m 6s
build-linux (zmain, lnl)	3m 10s
build-linux (zmain, tgl tgl-h)	5m 11s
build-linux (-d, mnfst, mtl)	4m 32s
compare-linux-win	1m 22s
	1h 17m 46s

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