feat: enable agent handling of stop requests #5419

Job	Run time
Agent unit tests	43s
CLI unit tests	30s
API Server unit tests	2m 53s
Build docker image	5m 36s
WebUI unit tests	1m 59s
config-e2e	1s
Tracetesting API Server (InMemory)	4m 6s
CLI smoke tests (local)	42s
CLI smoke tests (docker)	52s
CLI e2e tests (8, 0)	1m 13s
CLI e2e tests (8, 1)	1m 18s
WebUI End-to-end tests (1)	2m 43s
CLI e2e tests (8, 2)	1m 31s
Test examples (collector)	42s
WebUI End-to-end tests (2)	2m 46s
CLI e2e tests (8, 3)	1m 22s
Test examples (tracetest-jaeger)	42s
Tracetesting API Server (NATS)	4m 16s
WebUI End-to-end tests (3)	3m 55s
CLI e2e tests (8, 4)	1m 27s
Test examples (tracetest-opensearch)	7m 48s
WebUI End-to-end tests (4)	2m 45s
CLI e2e tests (8, 5)	1m 16s
Test examples (tracetest-tempo)	42s
WebUI End-to-end tests (5)	2m 41s
CLI e2e tests (8, 6)	3m 12s
Test examples (tracetest-provisioning-env)	42s
Test examples (tracetest-signoz)	2m 7s
WebUI End-to-end tests (6)	2m 48s
WebUI End-to-end tests (7)	2m 51s
CLI e2e tests (8, 7)	4m 27s
WebUI End-to-end tests (8)	2m 42s
	1h 13m 18s

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