fix(VInput): allow text selection in disabled inputs

[lentyaevpk]

Description

Fixes #14238

How Has This Been Tested?

Visually

Markup:

// Paste your FULL Playground.vue here
<template>
  <v-app id="inspire">
    <v-text-field
      v-model="model"
      style="width: 200px"
      single-line
      outlined
    ></v-text-field>
    <v-text-field
      v-model="model"
      style="width: 200px"
      disabled
      single-line
      outlined
    ></v-text-field>
  </v-app>
</template>

<script>
  export default {
    data () {
      return {
        model: 'this is long text... this is long text... this is long text... this is long text... this is long text... ',
      }
    },
  }
</script>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)

[johnleider]

This is also an issue with autocomplete, combobox, and select, we should update those as well.

Playground: https://www.toptal.com/developers/hastebin/axosoliqas.xml

[lentyaevpk]

@johnleider Updated autocomplete and combobox. Couldn't update select, because there is a div with text-overflow: ellipsis property