Add basic docs for integration setup and config (#1613) (#1614) #1776

Job	Run time
Run test group of app_analytics_test	19m 50s
Run test group of datasources_test	10m 39s
Run test group of event_analytics_test	23m 6s
Run test group of integrations_test	11m 24s
Run test group of metrics_analytics_test	11m 33s
Run test group of notebooks_test	14m 31s
Run test group of panels_test	15m 39s
Run test group of trace_analytics_test	27m 15s
	2h 13m 57s

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