feat: make pages _redirects limits configurable

What does this MR do?

Companion MR to feat: make _redirects limits configurable (gitlab-pages!778 - merged) (pages)

Depends on that MR getting merged.

See also Add documentation for configurable _redirects l... (gitlab!89780 - merged) for GitLab docs companion MR.

🛠 with ❤ at Siemens

Related issues

Optimize redirect system and find appropriate m... (gitlab-pages#472 - closed)

Checklist

See Definition of done.

For anything in this list which will not be completed, please provide a reason in the MR discussion

Required

• Merge Request Title, and Description are up to date, accurate, and descriptive
• MR targeting the appropriate branch
• MR has a green pipeline on GitLab.com
• Pipeline is green on dev.gitlab.org if the change is touching anything besides documentation or internal cookbooks
• trigger-package has a green pipeline running against latest commit

Expected (please provide an explanation if not completing)

• Test plan indicating conditions for success has been posted and passes
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA
• Equivalent MR/issue for the GitLab Chart opened