docs+examples(get started): add trace ingestion examples for nodejs, python, go #6614

Job	Run time
Build docker image	5m 56s
config-e2e	1s
CLI unit tests	36s
API Server unit tests	2m 42s
Agent unit tests	1m 23s
WebUI unit tests	2m 1s
Tracetesting API Server (InMemory)	3m 53s
CLI smoke tests (local)	45s
CLI e2e tests (8, 0)	1m 28s
CLI smoke tests (docker)	40s
WebUI End-to-end tests (1)	2m 41s
CLI e2e tests (8, 1)	1m 28s
Test examples (collector)	41s
WebUI End-to-end tests (2)	2m 42s
CLI e2e tests (8, 2)	1m 21s
Test examples (tracetest-jaeger)	40s
WebUI End-to-end tests (3)	2m 33s
CLI e2e tests (8, 3)	1m 25s
WebUI End-to-end tests (4)	3m 39s
Test examples (tracetest-opensearch)	7m 25s
Tracetesting API Server (NATS)	3m 51s
CLI e2e tests (8, 4)	1m 19s
WebUI End-to-end tests (5)	2m 39s
Test examples (tracetest-tempo)	41s
CLI e2e tests (8, 5)	2m 30s
WebUI End-to-end tests (6)	2m 38s
Test examples (tracetest-provisioning-env)	45s
WebUI End-to-end tests (7)	2m 37s
CLI e2e tests (8, 6)	1m 35s
WebUI End-to-end tests (8)	2m 30s
CLI e2e tests (8, 7)	3m 33s
	1h 8m 38s

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