Fail outstanding app requests on shutdown #2114

Job	Run time
Up-to-date protobuf	20s
Protobuf Lint	8s
Up-to-date mocks	2m 12s
e2e	10m 6s
e2e_existing_network	3m 8s
Fuzz	13m 51s
Up-to-date go.mod and go.sum	12s
Lint	3m 3s
Unit (macos-12)	13m 12s
Upgrade	1m 55s
Unit (ubuntu-20.04)	4m 39s
Unit (ubuntu-22.04)	4m 40s
Unit (windows-2022)	10m 10s
Unit (self-hosted, linux, ARM64, focal)	2m 46s
Unit (self-hosted, linux, ARM64, jammy)	2m 45s
	1h 13m 7s

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