[Backport 2.x] [Enhancement/Fix] Refactor datasources cypress tests #711

Job	Run time
Run test group of app_analytics_test	22m 40s
Run test group of datasources_test	10m 18s
Run test group of event_analytics_test	22m 31s
Run test group of integrations_test	11m 31s
Run test group of metrics_analytics_test	11m 30s
Run test group of notebooks_test	19m 47s
Run test group of panels_test	19m 18s
Run test group of trace_analytics_test	27m 2s
	2h 24m 37s

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