FileWidget and CheckboxWidget don't have accessible field labels

[JeffersonBledsoe]

Describe the bug

The FileWidget and CheckboxWidget both have labels provided by the <FormFieldWrapper> component, however, these fields are not programatically linked to the labels, failing multiple WCAG criterion such as SC 3.3.2: Labels or Instructions (A)

This is a follow on from my comment on #6332. Related to #5139

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Edit' view on a page
2. Using a screen reader find the 'Preview Image field' (can also use the accessibility tree to view it without a reader)
3. Listen to the screen reader output and you will hear there isn't an input with the label of 'Preview Image Field'
4. Do the same with the "Exclude from Navigation" checkbox

Expected behavior

• There is a clear input field
• There is a clear label field
• The label field is directly associated with the input field

Software (please complete the following information):

• OS: macOS & Linux
• Browser: Chrome, Safari, Firefox
• Volto Version 18.0.0-alpha.43