bug: unable to customize attributes on ion-select-option

Ionic version:
5.x

Current behavior:
Unable to set aria-label attribute on ion-select-option since ionic changes the ion-select element to custom markup before rendering.

Expected behavior:
We should be able to provide the aria-labels to ion-select-options to enhance a11y.

Please find the working repo [here](https://github.com/mastergogo/ion-repo-ion-select): on-page tab3.vue there is an example

Let me know if more info is needed.

Start with the working repository's tab3.vue example and reproduce the ion-select-option aria-label problem. Trace how ion-select-option becomes custom markup before rendering, then verify that supplied aria-label values reach the rendered options and improve accessibility.

Written by the indexing model from the issue text.