lib: vregion: lazy interim heap creation from remaining lifetime space #23394

Job	Run time
LP64-WIP	4m 15s
build-linux (mnfst, imx8 imx8x)	5m 23s
build-windows (mnfst, mtl)	9m 17s
build-linux (mnfst, ptl)	6m 8s
build-linux (-d, mnfst, lnl)	4m 55s
build-linux (mnfst, tgl)	4m 37s
build-linux (mnfst, imx8m imx8ulp)	4m 57s
manifest-check	2m 41s
build-windows (mnfst, lnl)	9m 6s
build-linux (mnfst, mtl)	4m 28s
build-linux (mnfst, wcl imx95)	7m 11s
build-linux (mnfst, tgl-h)	5m 4s
build-windows (-d, mnfst, lnl)	10m 2s
build-windows (mnfst, imx8m imx8ulp)	9m 30s
build-windows (mnfst, ptl)	10m 48s
build-linux (mnfst, lnl)	4m 29s
build-windows (mnfst, imx8 imx8x)	10m 33s
build-windows (mnfst, tgl)	9m 12s
build-windows (mnfst, tgl-h)	9m 18s
compare-linux-win	23s
	2h 12m 17s

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