fix(agent): update error handling on shutdown (#4012) #6505

Job	Run time
Build docker image	5m 48s
config-e2e	1s
Agent unit tests	1m 25s
CLI unit tests	27s
API Server unit tests	2m 38s
WebUI unit tests	1m 52s
CLI smoke tests (local)	40s
CLI e2e tests (8, 0)	1m 26s
CLI smoke tests (docker)	46s
WebUI End-to-end tests (1)	2m 39s
CLI e2e tests (8, 1)	1m 19s
Test examples (collector)	40s
CLI e2e tests (8, 2)	1m 25s
WebUI End-to-end tests (2)	2m 35s
Test examples (tracetest-jaeger)	50s
WebUI End-to-end tests (3)	2m 37s
Test examples (tracetest-opensearch)	7m 29s
CLI e2e tests (8, 3)	1m 28s
Tracetesting API Server (InMemory)	3m 58s
Test examples (tracetest-tempo)	38s
WebUI End-to-end tests (4)	2m 30s
Test examples (tracetest-provisioning-env)	39s
WebUI End-to-end tests (5)	2m 38s
CLI e2e tests (8, 4)	1m 25s
Tracetesting API Server (NATS)	3m 56s
WebUI End-to-end tests (6)	3m 43s
CLI e2e tests (8, 5)	2m 44s
WebUI End-to-end tests (7)	2m 38s
CLI e2e tests (8, 6)	1m 33s
WebUI End-to-end tests (8)	2m 29s
CLI e2e tests (8, 7)	3m 48s
	1h 8m 44s

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