Update how we use the author metatag in our Hugo sites

On most pages, we set the author metatag to the value set in author.name in config.toml.

I want to request that we change that behavior to match how we now do it in PHP: https://git.eclipse.org/c/www.eclipse.org/eclipse.org-common.git/commit/?id=8814fd23e2fa54d0c427b9ddd67919460f9dae4c

Basically, we don't want to set the author tag unless one is specified for the page. The concern here with the current solution is that the author may not be the actual content creator.

For this, we want to stop listing the user that implemented the page. We should be setting this value to the user/author that created the content.