gitea/templates/repo/release
Jason Song f9072dbf3c
Hide code links on release page if user cannot read code ()
On the release list page, if the user doesn't have the permission to
read code, the code links will lead to 404 pages or api errors:

<img width="1297" alt="image"
src="https://github.com/go-gitea/gitea/assets/9418365/a74fbc63-6dd6-43c6-853c-28acdbfdcb4e">


After this PR:

<img width="1297" alt="image"
src="https://github.com/go-gitea/gitea/assets/9418365/a626373d-c2df-40a9-8fed-1b12ff6bc56f">

And this PR also removed some dead code. After , the tag list page
has an independent template, and all `IsTag` in the release list
template are always false.
..
list.tmpl Hide code links on release page if user cannot read code ()
new.tmpl Fix missing buttons ()