Implement autofix for this-in-template

[NeonWizard]

What rule do you want to change?
eslint-plugin-vue/this-in-template

Does this change cause the rule to produce more or fewer warnings?
No.

How will the change be implemented? (New option, new default behavior, etc.)?
Adds the ability to try to automatically remove this from variables in the template.

Please provide some example code that this change will affect:

<template>
  <!-- ✓ AFTER -->
  <a :href="url">
    {{ text }}
  </a>
  
  <!-- ✗ BEFORE -->
  <a :href="this.url">
    {{ this.text }}
  </a>
</template>

What does the rule currently do for this code?
Just warns.

What will the rule do after it's changed?
Warns and attempts to fix if specified by removing this. prefix.