Updates specs to run on newer ruby versions, adds CGI.unescape to request.fullpath

[code-bunny]

What is the current behaviour?

• Currently the specs do not run on Ruby versions 3.3.x and 3.4.x.
• Pagination meta links in responses will return an escaped self link if this was passed into the request. (The other links in the meta data will be unescaped.)

What is the new behaviour?

• Specs now run on newer Ruby versions
• Unescape request.fullpath to match output from other pagination methods

Checklist

Please make sure the following requirements are complete:

• [ x ] Tests for the changes have been added (for bug fixes / features)
• [ x ] Docs have been reviewed and added / updated if needed (for bug fixes /
  features)
• [ x ] All automated checks pass (CI/CD)