Backport main - Metrics Explorer updated with PromQL (#1303) #494

Job	Run time
Run test group of app_analytics_test	23m 45s
Run test group of datasources_test	12m 57s
Run test group of event_analytics_test	24m 47s
Run test group of integrations_test	11m 29s
Run test group of metrics_analytics_test	11m 30s
Run test group of notebooks_test	49m 41s
Run test group of panels_test	19m 43s
Run test group of trace_analytics_test	29m 11s
	3h 3m 3s

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