Test: Inline Color Decorator & Color Picker performance fix

[rebornix]

Test for #32295

Complexity: 2

• anyOS @alexandrudima

• Color decorator rendering is moved to the core, we deprecated old extensions settings [css/less/sass/json].colorDecorators.enable and use language-aware editor.colorDecorators. Please verify that ppl can still use[css/less/sass/json].colorDecorators.enable: false to disable this feature and the new setting can do so as well.
• Color decorator will be changed only when users select one color in Color Picker, which happens when mouse up, instead of every mouse movement.
• Mouse down then move in Color Picker body should not make changes to the document. A simple extension can verify

  vscode.workspace.onDidChangeTextDocument( () => {
      console.log('content change');
  });
  

[alexdima]

Nice! ❤️