zephyr: Protect Zephyr heap metadata from corruption #251

Job	Run time
LP64-WIP	3m 58s
manifest-check	3m 11s
build-windows (mtl lnl)	10m 4s
build-windows (ptl)	7m 31s
build-windows (tgl tgl-h)	9m 28s
build-windows (-d, lnl)	8m 41s
build-windows (imx8 imx8x imx8m imx8ulp)	12m 40s
build-linux (zmain, ptl)	6m 49s
build-linux (mnfst, ptl)	4m 45s
build-linux (zmain, mtl lnl)	6m 4s
build-linux (mnfst, mtl lnl)	6m 4s
build-linux (mnfst, tgl tgl-h)	5m 27s
build-linux (zmain, tgl tgl-h)	5m 26s
build-linux (mnfst, --all)	16m 47s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 55s
build-linux (-d, mnfst, lnl)	4m 38s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 45s
compare-linux-win	43s
	2h 5m 56s

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