Add a simple batch allocator #22141

Job	Run time
manifest-check	2m 55s
LP64-WIP	4m 3s
build-windows (mtl lnl)	12m 2s
build-windows (ptl)	13m 21s
build-windows (tgl tgl-h)	11m 52s
build-windows (-d, lnl)	9m 58s
build-windows (imx8 imx8x imx8m imx8ulp)	14m 27s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 57s
build-linux (mnfst, tgl tgl-h)	5m 30s
build-linux (zmain, mtl lnl)	5m 51s
build-linux (mnfst, wcl imx95)	6m 53s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	7m 59s
build-linux (zmain, tgl tgl-h)	5m 19s
build-linux (zmain, ptl)	7m 51s
build-linux (mnfst, mtl lnl)	6m 4s
build-linux (mnfst, ptl)	5m 47s
build-linux (-d, mnfst, lnl)	7m 48s
compare-linux-win	31s
	2h 15m 8s

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