New comment by fosslinux on void-packages repository

https://github.com/void-linux/void-packages/pull/24357#issuecomment-680309483

Comment:
> Don't forget to revbump packages when dropping noarch in template. If rebuilding at once is too much, do in batches.

I plan to do this in a separate PR directly after this PR is merged.

The reason for the drop of `archs=noarch` in all templates is because after the first commit of this PR `archs=noarch` is syntactically incorrect.

I think we can make a distinction between removing noarch from `void-packages`(i.e. what this PR currently does) and removing noarch packages themselves from the mirrors (i.e. revbumping).