Bug 40585: Prune the manual more

This is huge: 24.9MB -> 5.4MB for the gzipped tarball!!

I've removed the fonts, even if they are referenced, because they cannot be used (for some security reason). However, we have enough fonts to render the manual anyway, maybe we have a slightly worse result, as we don't pack many weights.

I don't know how much we'll save on the final packages, but let's hope that we can get multi-lingual without an increased size with this.

I've preferred to add [% c("var/build_id") %] to the filename, to prevent conflicts with the tarballs created with the old script (even though old versions should never conflict, since people build with the tag).

We should ping the web team, and ask them if some of these files could be completely removed from their repos.

Closes #40585 (closed).