Allow get release download files and lfs files with oauth2 token format (#26430) (#27379)

Backport #26430 by @lunny

Fix #26165
Fix #25257

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

models/fixtures/attachment.yml

@@ -140,3 +140,16 @@
   download_count: 0
   size: 0
   created_unix: 946684800
+
+-
+  id: 12
+  uuid: a0eebc99-9c0b-4ef8-bb6d-6bb9bd380a22
+  repo_id: 2
+  issue_id: 0
+  release_id: 11
+  uploader_id: 2
+  comment_id: 0
+  name: README.md
+  download_count: 0
+  size: 0
+  created_unix: 946684800

models/fixtures/release.yml

@@ -136,3 +136,17 @@
   is_prerelease: false
   is_tag: false
   created_unix: 946684803
+
+- id: 11
+  repo_id: 2
+  publisher_id: 2
+  tag_name: "v1.1"
+  lower_tag_name: "v1.1"
+  target: ""
+  title: "v1.1"
+  sha1: "205ac761f3326a7ebe416e8673760016450b5cec"
+  num_commits: 2
+  is_draft: false
+  is_prerelease: false
+  is_tag: false
+  created_unix: 946684803