Refactor PageListComponent

[lfdebrux]

What problem does this pull request solve?

Some changes we have made to our designs mean we can remove a bunch of code from the PageListComponent related to numbering routes. This PR also makes some tweaks to the method arguments to be more consistent with other classes in our codebase.

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• Ensure that you consider the wider context.
• Does it work when run on your machine?
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• Do the commit messages explain why the changes were made?
• Are there all the unit tests needed?
• Has all relevant documentation been updated?

[github-actions]

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[github-actions]

🎉 A review copy of this PR has been deployed! You can reach it at https://pr-1798.review.forms.service.gov.uk/.

It may take 5 minutes or so for the application to be fully deployed and working. If it still isn't ready
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The base branch was changed.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

🎉 A review copy of this PR has been deployed! You can reach it at https://pr-1798.review.forms.service.gov.uk/.

It may take 5 minutes or so for the application to be fully deployed and working. If it still isn't ready
after 5 minutes, there may be something wrong with the ECS task. You will need to go to the integration AWS account
to debug, or otherwise ask an infrastructure person.

For more details please see the review app wiki page