Support setting the bundleroot for manifest generated projects #637

Job	Run time
check-freeze-period / verify-freeze-period	2s
build / Verify Linux	20m 48s
build / Upload Event File	4s
build / Verify Windows	25m 49s
build / Verify MacOS	23m 38s
check-merge-commits / Block Merge Commits	10s
	1h 10m 31s

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