fix: cart item sanitization

[Soare-Robert-Daniel]

Summary

Instead of rejecting the cart items with HTML elements, we sanitized them. The sanitation will apply to all the field's values.

Note

The HTML fields also send their content to the cart item, which makes any combination of fields to be rejected.

Will affect visual aspect of the product

NO

Test instructions

• Use the Textarea, File, and HTML PPOM field.
• In the textarea add some HTML content and add the time to the cart.
• The item should be added, and all HTML elements of the Textarea and HTML fields content should be stripped down.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes #306

[pirate-bot]

Plugin build for 6c6b305 is ready 🛎️!

• Download PPOM - build 🔗

[pirate-bot]

🎉 This PR is included in version 32.0.23 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀