zephyr: alloc: add 32K virtual heap bucket #22858

Job	Run time
LP64-WIP	3m 43s
build-windows (imx8 imx8x)	10m 30s
build-windows (-d, lnl)	9m 36s
build-windows (imx8m imx8ulp)	10m 31s
build-windows (mtl)	9m 31s
build-windows (ptl)	10m 7s
build-windows (tgl-h)	10m 33s
manifest-check	2m 38s
build-windows (tgl)	9m 45s
build-windows (lnl)	8m 9s
build-linux (mnfst, lnl)	4m 37s
build-linux (mnfst, imx8 imx8x)	5m 36s
build-linux (mnfst, mtl)	4m 27s
build-linux (mnfst, imx8m imx8ulp)	4m 52s
build-linux (-d, mnfst, lnl)	4m 29s
build-linux (mnfst, tgl)	4m 10s
build-linux (mnfst, tgl-h)	5m 6s
build-linux (mnfst, ptl)	5m 49s
build-linux (mnfst, wcl imx95)	7m 9s
compare-linux-win	27s
	2h 11m 45s

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