docs(getting-started): updated flow and added on-prem #6350

Job	Run time
Agent unit tests	2m 13s
CLI unit tests	1m 42s
API Server unit tests	3m 44s
WebUI unit tests	1m 48s
Build docker image	6m 7s
config-e2e	1s
CLI smoke tests (local)	40s
CLI e2e tests (8, 0)	2m 33s
Test examples (collector)	40s
CLI smoke tests (docker)	39s
CLI e2e tests (8, 1)	2m 27s
WebUI End-to-end tests (1)	2m 43s
Test examples (tracetest-jaeger)	39s
CLI e2e tests (8, 2)	2m 29s
WebUI End-to-end tests (2)	2m 42s
Test examples (tracetest-opensearch)	7m 22s
WebUI End-to-end tests (3)	2m 44s
CLI e2e tests (8, 3)	2m 39s
Test examples (tracetest-tempo)	38s
Tracetesting API Server (InMemory)	3m 53s
WebUI End-to-end tests (4)	2m 42s
Test examples (tracetest-provisioning-env)	40s
WebUI End-to-end tests (5)	2m 44s
WebUI End-to-end tests (6)	3m 34s
Tracetesting API Server (NATS)	4m 0s
WebUI End-to-end tests (7)	2m 43s
WebUI End-to-end tests (8)	2m 46s
CLI e2e tests (8, 4)	2m 31s
CLI e2e tests (8, 5)	4m 2s
CLI e2e tests (8, 6)	2m 41s
CLI e2e tests (8, 7)	4m 48s
	1h 21m 34s

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