[Metrics][Discover] Add an option to clear the selection in the dropdowns#233776

jennypavlova merged 22 commits intoelastic:mainelastic/kibana:mainfrom

jennypavlova:233653-metricsdiscover-add-an-option-to-clear-the-selection-in-the-dropdownsjennypavlova/kibana:233653-metricsdiscover-add-an-option-to-clear-the-selection-in-the-dropdownsCopy head branch name to clipboard