fix some ui bug about draft release (#15137)

fix some ui bug about draft release (#15137)

* fix some ui bug about draft release

- should not show draft release in tag list because
  it will't create real tag
- still show draft release without tag and commit message
  for draft release instead of 404 error
- remove tag load for attachement links because it's useless

Signed-off-by: a1012112796 <1012112796@qq.com>
* add test code

* fix test

That's because has added a new release in relaese test database.

* fix dropdown link for draft release