disable llext #717

Job	Run time
LP64-WIP	4m 58s
manifest-check	59s
build-windows (tgl tgl-h)	5m 4s
build-windows (mtl lnl)	4m 54s
build-windows (ptl)	5m 18s
build-linux (mnfst, ptl)	4m 11s
build-linux (mnfst, mtl lnl)	4m 10s
build-windows (-d, lnl)	4m 52s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	3m 47s
build-linux (mnfst, tgl tgl-h)	3m 55s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	3m 41s
build-linux (mnfst, --all)	3m 54s
build-linux (zmain, mtl lnl)	4m 14s
build-linux (-d, mnfst, lnl)	4m 4s
build-linux (zmain, tgl tgl-h)	3m 57s
build-windows (imx8 imx8x imx8m imx8ulp)	5m 6s
build-linux (zmain, ptl)	4m 4s
compare-linux-win	23s
	1h 11m 31s

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