[upstream] Avoid allowing alignment on all <$block> tags

Problem/Motivation

The test coverage introduced in #3259174: Add missing CKE5 SmartDefaultSettings test coverage (wildcard tag with unsupported attribute) shows that the CKE5 alignment feature always adds the class="text-align-*" classes on all<$block> tags, rather than just a subset of them.

This means that you cannot make it possible to center align paragraphs, without also adding that same ability to <h1> or <dd>.

That is pretty confusing/unexpected.

Steps to reproduce

TBD

Proposed resolution

TBD

Remaining tasks

1. Wait for https://github.com/ckeditor/ckeditor5/issues/11131 to be fixed upstream.
2. TBD

User interface changes

TBD

API changes

TBD

Data model changes

TBD

Release notes snippet

TBD