internal/frontend: reorganize cases in fetchDetailsForModule
internal/frontend: reorganize cases in fetchDetailsForModule

Tabs in fetchDetailsForModule are organized in order of how they appear
on the site.

For golang/go#39629

Change-Id: Ie2317a9886d0494e08e9789bdfd2b5f9e300a518
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/250503
Reviewed-by: Jamal Carvalho <e0195770807aa8c82b0b128d9c0423b5ad035172@golang.org>

golang/pkgsite,golang/pkgsite,golang/pkgsite,golang/pkgsite