chore(docs): adding recipe on how to use secrets #6210

Job	Run time
Build docker image	6m 35s
config-e2e	1s
Agent unit tests	1m 37s
CLI unit tests	1m 30s
API Server unit tests	3m 37s
WebUI unit tests	2m 16s
CLI smoke tests (local)	46s
Test examples (collector)	44s
CLI e2e tests (8, 0)	2m 45s
Test examples (tracetest-jaeger)	44s
WebUI End-to-end tests (1)	2m 42s
CLI e2e tests (8, 1)	2m 33s
CLI smoke tests (docker)	44s
WebUI End-to-end tests (2)	2m 47s
Test examples (tracetest-opensearch)	7m 39s
CLI e2e tests (8, 2)	2m 32s
WebUI End-to-end tests (3)	2m 49s
Test examples (tracetest-tempo)	45s
CLI e2e tests (8, 3)	2m 24s
WebUI End-to-end tests (4)	2m 46s
Test examples (tracetest-provisioning-env)	45s
CLI e2e tests (8, 4)	2m 25s
Tracetesting API Server (InMemory)	3m 59s
WebUI End-to-end tests (5)	3m 41s
Test examples (tracetest-signoz)	2m 18s
CLI e2e tests (8, 5)	2m 31s
WebUI End-to-end tests (6)	2m 44s
CLI e2e tests (8, 6)	3m 58s
WebUI End-to-end tests (7)	2m 48s
CLI e2e tests (8, 7)	4m 48s
Tracetesting API Server (NATS)	4m 3s
WebUI End-to-end tests (8)	2m 43s
	1h 24m 59s

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