perf: enable jsx optimize

[KaelWD]

fixes #19919 117ms -> 42ms
fixes #21720 930ms -> 30ms

lists are still ~4x faster though

[github-actions]

🚀 Nightly release published to @vuetify/nightly@3.9.0-pr-21528.133e094.

[KaelWD]

This will need real-world testing to ensure it doesn't introduce reactivity problems.

[KaelWD]

Breaks dynamic slots, with optimize: true the label doesn't change:

<template>
  <v-app>
    <v-container>
      <v-switch v-model="customLabel" />

      <v-text-field label="Label">
        <template v-if="customLabel" #label="{ label }">Custom {{ label }}</template>
      </v-text-field>
    </v-container>
  </v-app>
</template>

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

  const customLabel = ref(false)
</script>