fix(agent): return correct cors headers for ingestion endpoint #6420

Job	Run time
config-e2e	1s
Build docker image	6m 4s
Agent unit tests	2m 50s
WebUI unit tests	1m 52s
API Server unit tests	4m 21s
CLI unit tests	4m 30s
CLI smoke tests (local)	40s
Test examples (collector)	39s
CLI e2e tests (8, 0)	1m 8s
CLI smoke tests (docker)	39s
Test examples (tracetest-jaeger)	43s
WebUI End-to-end tests (1)	2m 26s
CLI e2e tests (8, 1)	1m 14s
Test examples (tracetest-opensearch)	7m 20s
WebUI End-to-end tests (2)	2m 30s
CLI e2e tests (8, 2)	1m 20s
Test examples (tracetest-tempo)	44s
WebUI End-to-end tests (3)	2m 25s
Tracetesting API Server (InMemory)	3m 58s
CLI e2e tests (8, 3)	1m 14s
Test examples (tracetest-provisioning-env)	40s
WebUI End-to-end tests (4)	2m 30s
CLI e2e tests (8, 4)	1m 31s
WebUI End-to-end tests (5)	2m 30s
CLI e2e tests (8, 5)	2m 40s
WebUI End-to-end tests (6)	2m 27s
Tracetesting API Server (NATS)	4m 1s
CLI e2e tests (8, 6)	1m 20s
WebUI End-to-end tests (7)	3m 34s
CLI e2e tests (8, 7)	3m 33s
WebUI End-to-end tests (8)	2m 32s
	1h 13m 56s

Provide feedback