fix(tags): make the 'delete' event cancelable

[imlutr]

Make the delete event cancelable for the sp-tag element.

Related issue(s)

• fixes [Bug]: sp-tag's 'delete' event is not cancelable #3777

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Checklist

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• If my change required a change to the documentation, I have updated the documentation in this pull request.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have reviewed at the Accessibility Practices for this feature, see: Aria Practices

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[Westbrook]

Thanks for opening this WITH a test!

One small note and I can't see why CI wouldn't agree with me to merge this in.

[Westbrook]

LGTM!