Chomp whitespace from options

[snim2]

This PR was prompted by a go-live, where a user had left whitespace in the AwC options form
resulting in analytics not being collected.

Description of changes

• Fix a typo
• Provide input validation for options form
• Trim values in options form before use

Testing

1. Run a local site
2. Add this plugin on the main branch
3. Add values to the options form which contain spaces
4. Validate that the space appear in the generated HTML of the homepage
5. Switch to this branch fix/chomp-whitespace-from-options
6. Refresh the homepage
7. Check the HTML has not spaces in analytics IDs
8. Go to http://localhost/wp-admin/options-general.php?page=analytics-with-consent
9. Add spaces to all text fields
10. Try to update the options and check that you get validation errors on all text fields

Checklist

• Changelog updated
• If new release: major version tag to be bumped after release (see docs)

[matthewpassmore]

Works as expected 👍