feat(select): add required prop (#30155)

Issue number: resolves internal

---------

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## What is the current behavior?
- Currently, the screen reader do not announce the component as required
when `required={true}`.

## What is the new behavior?
- Added a new `required` prop to be used for accessibility purposes that
adds the `aria-required` attribute to select's inner native button.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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screenshots of how the component looks before and after the change. -->

packages/vue/src/proxies.ts

@@ -883,6 +883,7 @@ export const IonSelect = /*@__PURE__*/ defineContainer<JSX.IonSelect, JSX.IonSel
   'expandedIcon',
   'shape',
   'value',
+  'required',
   'ionChange',
   'ionCancel',
   'ionDismiss',