[Backport 2.16] [Bugfix] Add toast message for getting started / Fix Nav Bug for Traces #2824

Job	Run time
Run test group of app_analytics_test	23m 34s
Run test group of datasources_test	14m 58s
Run test group of event_analytics_test	23m 20s
Run test group of integrations_test	11m 58s
Run test group of metrics_analytics_test	14m 51s
Run test group of notebooks_test	14m 43s
Run test group of panels_test	15m 51s
Run test group of trace_analytics_test	28m 42s
	2h 27m 57s

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