docs+examples(get started): add trace ingestion examples for nodejs, python, go #6619

Job	Run time
CLI unit tests	32s
Agent unit tests	1m 5s
API Server unit tests	2m 48s
WebUI unit tests	2m 4s
Build docker image	5m 33s
config-e2e	1s
CLI smoke tests (local)	46s
CLI smoke tests (docker)	47s
Tracetesting API Server (InMemory)	3m 53s
Tracetesting API Server (NATS)	3m 53s
Test examples (collector)	40s
CLI e2e tests (8, 0)	1m 29s
Test examples (tracetest-jaeger)	42s
CLI e2e tests (8, 1)	1m 22s
WebUI End-to-end tests (1)	2m 49s
Test examples (tracetest-opensearch)	7m 18s
CLI e2e tests (8, 2)	1m 27s
WebUI End-to-end tests (2)	2m 44s
Test examples (tracetest-tempo)	45s
CLI e2e tests (8, 3)	1m 21s
WebUI End-to-end tests (3)	2m 47s
Test examples (tracetest-provisioning-env)	41s
CLI e2e tests (8, 4)	1m 27s
WebUI End-to-end tests (4)	3m 29s
CLI e2e tests (8, 5)	2m 27s
WebUI End-to-end tests (5)	2m 41s
CLI e2e tests (8, 6)	1m 23s
CLI e2e tests (8, 7)	3m 29s
WebUI End-to-end tests (6)	2m 41s
WebUI End-to-end tests (7)	2m 38s
WebUI End-to-end tests (8)	2m 43s
	1h 8m 25s

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