feat(SELECT): Allow dropdown to be wider than parent form-field like before v15

Feature Description

Since v15, mat-select dropdown menu width stick strictly to the mat-select itself (cf. https://material.angular.io/guide/mdc-migration#select). But IMO, this is a terrible behavior because it may decrease usability on small devices or, more generally, in any place you need to have a small select (like a select inside a search field, exemple : https://www.amazon.com/). It may force devs to switch to a mat-menu alternative which is not built to work with form controls

Use Case

What was done in previous versions of Angular Material was great and solve issues exposed above

[stnor]

One simple use case: selected value is a flag icon, items are flag + language in text.

[mmalerba]

I’m saying its something we should support in the future.