refactor: replace $request->uri with $request->getUri()

[kenjis]

Description
See #5344

There is no withUri() method in the Request, can't replace the code like:

$request->uri = new URI('http://example.com/assets/image.jpg');

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• [] User guide updated
• Conforms to style guide