fix(VSelect): expose clickable icons to screen readers

[KaelWD]

Description

Related: #10461, #10439

Markup:

<template>
  <v-container>
    <v-select clearable prepend-inner-icon="mdi-vuetify" menu-props="offsetY" @click:prepend-inner="" :items="['a', 'b', 'c']" v-model="selected"></v-select>
  </v-container>
</template>

<script>
  export default {
    data: () => ({
      selected: null
    })
  }
</script>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)