Add basic docs for integration setup and config (#1613) #1735

Job	Run time
Run test group of app_analytics_test	20m 5s
Run test group of datasources_test	11m 0s
Run test group of event_analytics_test	22m 34s
Run test group of integrations_test	11m 58s
Run test group of metrics_analytics_test	15m 33s
Run test group of notebooks_test	14m 23s
Run test group of panels_test	15m 32s
Run test group of trace_analytics_test	27m 45s
	2h 18m 50s

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