fix(VInput): prior prepend, append slots over props

[SonTT19]

Description

fixes #22332

Markup:

<template>
  <v-app>
    <v-container>
      <v-date-input v-model="msg" label="default" />
      <v-date-input
        v-model="msg"
        label="with prepend icon"
        prepend-icon="mdi-calendar"
      />
      <v-date-input
        v-model="msg"
        label="with prepend icon and prepend slot"
        prepend-icon="mdi-calendar"
      >
        <template #prepend>
          <v-icon icon="mdi-calendar" />
        </template>
      </v-date-input>
      <v-date-input
        v-model="msg"
        label="with empty prepend icon and prepend slot"
        prepend-icon=""
      >
        <template #prepend>
          <v-icon icon="mdi-calendar" />
        </template>
      </v-date-input>
    </v-container>
  </v-app>
</template>

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

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

[J-Sek]

Looks fine. This would be in line with v2.

Should probably cover prepend-inner and append-inner in VField.tsx