llext: remove third-party modules from SOF lib #19917

Job	Run time
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 39s
build-windows (imx8 imx8x imx8m imx8ulp)	8m 42s
build-linux (mnfst, mtl lnl)	6m 24s
build-windows (mtl lnl)	7m 23s
build-linux (mnfst, ptl)	5m 36s
build-windows (ptl)	6m 36s
build-linux (mnfst, tgl tgl-h)	5m 35s
LP64-WIP	4m 41s
build-windows (tgl tgl-h)	7m 8s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 31s
build-windows (-d, lnl)	5m 24s
build-linux (zmain, mtl lnl)	5m 53s
manifest-check	47s
build-linux (zmain, ptl)	4m 35s
build-linux (zmain, tgl tgl-h)	5m 34s
build-linux (-d, mnfst, lnl)	5m 33s
build-linux (mnfst, --all)	14m 9s
compare-linux-win	1m 2s
	1h 48m 12s

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