Fix disabled boolean input

[Madeorsk]

Problem

There is a rerender loop when viewing the boolean input story when is it disabled.

Solution

Do not try to reset the field when the input is disabled. If you need an updated defaultValue while still having the input disabled, you should use readOnly.

How To Test

View and play with the Disabled story of BooleanInput: https://react-admin-storybook-i09ggoby2-marmelab.vercel.app/?path=/story/ra-ui-materialui-input-booleaninput--disabled

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes unit tests (if not possible, describe why)
• The PR includes one or several stories (if not possible, describe why)
• The documentation is up to date