fix(VSelect): add aria-label a11y (#21164)

[jcjp]

Description

Fixes: #21164

Missing aria-label on VList inside VSelect. Used axe developer tool to check if now fixed.

Markup:

<template>
  <v-app>
    <v-select
      label="Select"
      :menu="true"
      :items="['California', 'Colorado', 'Florida', 'Georgia', 'Texas', 'Wyoming']"
    />
  </v-app>
</template>

[johnleider]

It seems simple enough but there is always subjectiveness when it comes to a11y. Hopefully kael can find time to comment.

[johnleider]

Is this related to #20339 at all?

[jcjp]

Is this related to #20339 at all?

Oh it seems to be related, on my side I modified the nested component VList while on that PR linked it is VVirtualScroll > VListItem > VCheckboxBtn.