Add Pages -insecure-ciphers support

What does this MR do?

Add support for Pages -insecure-ciphers command-line flag

Checklist

See Definition of done.

• Changelog entry created. Not applicable for Documentation changes and minor changes.
• Documentation created/updated
• Tests added
• Integration tests added to GitLab QA, if applicable
• MR targeting master branch
• MR has a green pipeline on GitLab.com
• Equivalent MR/issue for CNG opened if applicable

Reviewer Checklist

In addition to above, reviewer must:

• Pipeline is green on dev.gitlab.org if the change is not touching documentation or internal cookbooks

References

gitlab-pages#150 (closed)

!3275 (merged)

gitlab-pages!145 (merged)