PD-1403 / 25.04 / redirect CORE nightly content to maintenance version

[Mrt134]

This is for master branch content only to redirect the nightly dev content URLs that are anticipated to offline back to the evergreen 13.0 (or 13.3 in some specific cases) content URLs.

Still to do:

• TrueCommand nightly dev content redirects
• Rework website version selector to remove CORE > Nightly and TrueCommand > Nightly options.

Thanks for contributing to TrueNAS documentation! By opening a Pull Request, you're acknowledging that your changes will be distributed under the Creative Commons 4.0 license.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/PD-1403

[bugclerk]

This PR has been merged and conversations have been locked. If you would like to discuss more about this issue please use our forums or raise a Jira ticket.