docs+examples(get started): add trace ingestion examples for nodejs, python, go #6617

Job	Run time
Agent unit tests	1m 19s
CLI unit tests	40s
API Server unit tests	3m 2s
Build docker image	5m 42s
config-e2e	1s
WebUI unit tests	2m 2s
Tracetesting API Server (NATS)	3m 53s
CLI smoke tests (local)	41s
CLI e2e tests (8, 0)	1m 16s
CLI smoke tests (docker)	43s
WebUI End-to-end tests (1)	2m 29s
CLI e2e tests (8, 1)	1m 25s
Test examples (collector)	40s
WebUI End-to-end tests (2)	2m 31s
CLI e2e tests (8, 2)	1m 19s
WebUI End-to-end tests (3)	2m 26s
CLI e2e tests (8, 3)	1m 31s
Test examples (tracetest-jaeger)	39s
Tracetesting API Server (InMemory)	3m 50s
CLI e2e tests (8, 4)	1m 23s
Test examples (tracetest-opensearch)	7m 28s
WebUI End-to-end tests (4)	2m 25s
CLI e2e tests (8, 5)	2m 26s
Test examples (tracetest-tempo)	40s
WebUI End-to-end tests (5)	3m 31s
CLI e2e tests (8, 6)	1m 23s
WebUI End-to-end tests (6)	2m 29s
Test examples (tracetest-provisioning-env)	40s
CLI e2e tests (8, 7)	3m 25s
WebUI End-to-end tests (7)	2m 36s
WebUI End-to-end tests (8)	2m 32s
	1h 7m 7s

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