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/ShareModal/ShareSnapshot.tsx

@@ -222,7 +222,6 @@ export class ShareSnapshot extends PureComponent<Props, State> {
         <Field label="Expire">
           <Select
             inputId="expire-select-input"
-            menuShouldPortal
             width={30}
             options={expireOptions}
             value={selectedExpireOption}