fix(VSelect): replace onfocusout with onAfterleave

[yuwu9145]

fix #17214

Description

Cause:

VMenu is removed when enter key to select, on firefox, when element is removed, onfocusout is not triggered.

This onfocusout bug is confirmed on firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1829602

Markup:

<template>
  <v-app>
    <v-main>
      <v-container>
        <v-autocomplete
          label="Label 1"
          name="label1"
          :items="items"
        />
        <v-autocomplete
          label="Label 2"
          name="label2"
          :items="items"
        />
        <v-select
          label="Label 2"
          name="label2"
          :items="items"
        />
        <v-combobox
          label="Label 2"
          name="label2"
          :items="items"
        />
        <v-btn>
        	Label 3
        </v-btn>
      </v-container>
    </v-main>
  </v-app>
</template>

<script setup>
    const items = [
        "Item 1",
        "Item 2",
        "Item 3",
    ];
</script>