Select: Portal menu by default (#48176)

* Remove menuShouldPortal from all <Select /> components

* fix unit tests

* leave menuShouldPortal as an escape hatch

* Fix import order

public/app/features/dashboard/components/PanelEditor/getPanelFrameOptions.tsx

@@ -138,7 +138,6 @@ export function getPanelFrameCategory(props: OptionPaneRenderProps): OptionsPane
               const maxPerRowOptions = [2, 3, 4, 6, 8, 12].map((value) => ({ label: value.toString(), value }));
               return (
                 <Select
-                  menuShouldPortal
                   options={maxPerRowOptions}
                   value={panel.maxPerRow}
                   onChange={(value) => onPanelConfigChange('maxPerRow', value.value)}