llext: use the new inspection API #19891

Job	Run time
build-windows (imx8 imx8x imx8m imx8ulp)	8m 4s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 36s
build-windows (mtl lnl)	7m 29s
LP64-WIP	4m 34s
build-linux (mnfst, mtl lnl)	6m 34s
build-windows (ptl)	6m 44s
build-linux (mnfst, ptl)	4m 43s
build-windows (tgl tgl-h)	7m 3s
manifest-check	52s
build-linux (mnfst, tgl tgl-h)	5m 36s
build-windows (-d, lnl)	5m 29s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 30s
build-linux (zmain, mtl lnl)	5m 45s
build-linux (zmain, ptl)	4m 46s
build-linux (zmain, tgl tgl-h)	5m 27s
build-linux (-d, mnfst, lnl)	4m 43s
build-linux (mnfst, --all)	14m 12s
compare-linux-win	33s
	1h 45m 40s

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