chore(agent): add debug logs for otlp connection tester (#4011) #6502

Job	Run time
API Server unit tests	2m 41s
CLI unit tests	32s
Build docker image	5m 40s
config-e2e	1s
Agent unit tests	1m 20s
WebUI unit tests	2m 15s
CLI smoke tests (local)	45s
Tracetesting API Server (InMemory)	3m 54s
CLI smoke tests (docker)	45s
Test examples (collector)	44s
CLI e2e tests (8, 0)	1m 14s
Test examples (tracetest-jaeger)	44s
Tracetesting API Server (NATS)	3m 55s
CLI e2e tests (8, 1)	1m 23s
Test examples (tracetest-opensearch)	7m 29s
CLI e2e tests (8, 2)	1m 37s
Test examples (tracetest-tempo)	43s
CLI e2e tests (8, 3)	1m 49s
Test examples (tracetest-provisioning-env)	45s
CLI e2e tests (8, 4)	1m 36s
CLI e2e tests (8, 5)	2m 53s
CLI e2e tests (8, 6)	1m 39s
WebUI End-to-end tests (1)	2m 59s
WebUI End-to-end tests (2)	2m 56s
CLI e2e tests (8, 7)	3m 47s
WebUI End-to-end tests (3)	2m 51s
WebUI End-to-end tests (4)	3m 38s
WebUI End-to-end tests (5)	2m 58s
WebUI End-to-end tests (6)	2m 56s
WebUI End-to-end tests (7)	2m 54s
WebUI End-to-end tests (8)	3m 1s
	1h 12m 24s

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