fix(VColorPicker): Allow swatches to be disabled

[yuwu9145]

fixes #13160

Description

fixes #13160

Motivation and Context

close #13160

How Has This Been Tested?

visually

Markup:

// Paste your FULL Playground.vue here
<template>
  <v-container>
    <v-row>
      <v-col>
        <h3>Enabled</h3>
        <v-color-picker show-swatches></v-color-picker>
      </v-col>
      <v-col>
        <h3>Disabled</h3>
        <v-color-picker show-swatches disabled></v-color-picker>
      </v-col>
      <v-col>
        <h3>The problem</h3>
        <p>
          While canvas, inputs and sliders are all "disabled" and cannot be
          interacted with, the swatches can still be used.
        </p>
      </v-col>
    </v-row>
  </v-container>
</template>

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)