fix(cli): improve display of error responses for token exchange #6491

Job	Run time
CLI unit tests	38s
API Server unit tests	2m 37s
Build docker image	5m 46s
config-e2e	1s
WebUI unit tests	1m 49s
Agent unit tests	1m 0s
Test examples (collector)	43s
Tracetesting API Server (NATS)	4m 17s
Test examples (tracetest-jaeger)	40s
CLI smoke tests (local)	39s
CLI e2e tests (8, 0)	1m 35s
Test examples (tracetest-opensearch)	7m 25s
CLI smoke tests (docker)	41s
CLI e2e tests (8, 1)	1m 24s
Test examples (tracetest-tempo)	38s
Tracetesting API Server (InMemory)	3m 49s
CLI e2e tests (8, 2)	1m 24s
Test examples (tracetest-provisioning-env)	43s
CLI e2e tests (8, 3)	1m 23s
WebUI End-to-end tests (1)	3m 30s
CLI e2e tests (8, 4)	1m 25s
WebUI End-to-end tests (2)	2m 32s
CLI e2e tests (8, 5)	2m 32s
WebUI End-to-end tests (3)	2m 29s
CLI e2e tests (8, 6)	1m 32s
WebUI End-to-end tests (4)	2m 30s
CLI e2e tests (8, 7)	3m 42s
WebUI End-to-end tests (5)	2m 33s
WebUI End-to-end tests (6)	2m 30s
WebUI End-to-end tests (7)	2m 27s
WebUI End-to-end tests (8)	2m 33s
	1h 7m 27s

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