Dispose activity management during shutdown completely and early #1084 #1151

Job	Run time
check-merge-commits / Block Merge Commits	9s
check-freeze-period / verify-freeze-period	4s
build / Upload Event File	3s
build / Verify Linux	40m 26s
build / Verify Windows	46m 23s
build / Verify MacOS	50m 56s
	2h 18m 1s

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