LLEXT: run non-performance critical code in DRAM #19300

Job	Run time
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 0s
build-windows (imx8 imx8x imx8m imx8ulp)	7m 55s
build-linux (mnfst, mtl)	4m 15s
build-windows (mtl)	5m 42s
build-linux (mnfst, lnl)	4m 20s
build-windows (tgl tgl-h)	6m 11s
build-linux (mnfst, tgl tgl-h)	5m 37s
build-windows (-d, mtl)	5m 14s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 2s
build-linux (zmain, mtl)	4m 4s
LP64-WIP	3m 54s
build-linux (zmain, lnl)	3m 50s
build-linux (zmain, tgl tgl-h)	5m 29s
manifest-check	46s
build-linux (-d, mnfst, mtl)	4m 27s
build-linux (mnfst, --all)	12m 15s
compare-linux-win	21s
	1h 26m 22s

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