fix(azure): adopt observed service cancellation #1517

Job	Run time
Repo invariants	8s
Behavior test shard plan	8s
Behavior tests (focused Azure service)	1m 51s
Lint shell scripts	10s
Agent Fleet package	-1s
Behavior tests (shard ${{ matrix.shard }}/8)	-1s
Behavior tests	6s
	2m 21s

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