Add ability to enable/disable xet storage on a repo #7411

Job	Run time
build-windows (3.8)	6m 45s
build-ubuntu (3.8, Repository only)	1m 51s
build-ubuntu (3.8, Everything else)	5m 13s
build-ubuntu (3.8, Inference only)	48s
build-ubuntu (3.8, Xet only)	33s
build-ubuntu (3.13, Repository only)	1m 58s
build-ubuntu (3.13, Everything else)	4m 58s
build-ubuntu (3.13, Inference only)	1m 36s
build-ubuntu (3.13, Xet only)	34s
build-ubuntu (3.13, lfs)	57s
build-ubuntu (3.8, fastai)	1m 28s
build-ubuntu (3.10, fastai)	52s
build-ubuntu (3.8, tensorflow)	1m 6s
build-ubuntu (3.10, tensorflow)	1m 1s
build-ubuntu (3.8, Python 3.8, torch_1.11)	1m 9s
build-ubuntu (3.12, torch_latest)	1m 0s
	31m 49s

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