fix(VField): hide label with single-line

[SonTT19]

Description

fixes #20751
fixes #20772

Markup:

<template>
  <v-app>
    <v-container>
      <v-text-field />
      <v-text-field :label="msg" />
      <v-text-field :label="msg" single-line />
    </v-container>
  </v-app>
</template>

<script setup>
  import { ref } from 'vue'

  const msg = ref('Hello World!')
</script>

[ranjith19]

This needs to be merged if correct - we had to lock the version to 3.7.4 due to the regression.

[xqqp]

Looking forward to this PR getting merged. The CI failures don't seem related to this change.