RegisterEditorComponent (custom widget) FIELDS - Required not working

**Describe the bug**
The 'required' and 'pattern' for custom widgets is not working.
It shouldn't allow to save the updates if all required fields are not filled.

**To Reproduce**
1. Create a custom widget using CMS.registerEditorComponent
2. Set a field as required: true
3. Insert the widget inside the markdown and don't fill the required field
4. Save the updates

`
window.CMS.registerEditorComponent({
id: 'collection',
label: 'Collection',
collapsed: true,
fields: [
{
label: 'Cards',
name: 'cards',
widget: 'list',
fields: [
{
label: 'Title',
name: 'title',
widget: 'string',
required: true,
},
]
`

**Expected behavior**
Won't allow save the updates since the field is mandatory.

**Applicable Versions:**
- netlify-cms-app 2.15.72
- netlify-cms-core 2.55.2
- netlify-cms 2.10.192
- Git provider: gitlab
- OS: windows 10
- Node.JS version: 16.16