Add commit statuses reports on pull request view (#6845)

* Add commit statuses reports on pull view

* Add some translations

* improve the UI

* fix fmt

* fix tests

* add a new test git repo to fix tests

* fix bug when headRepo or headBranch missing

* fix tests

* fix tests

* fix consistency

* fix tests

* fix tests

* change the test repo

* fix tests

* fix tests

* fix migration

* keep db size consistency

* fix translation

* change commit hash status table unique index

* remove unused table

* use char instead varchar

* make hashCommitStatusContext private

* split merge section with status check on pull view ui

* fix tests; fix arc-green theme on pull ui

models/fixtures/pull_request.yml

@@ -26,3 +26,17 @@
   base_branch: master
   merge_base: fedcba9876543210
   has_merged: false
+
+-
+  id: 3
+  type: 0 # gitea pull request
+  status: 2 # mergable
+  issue_id: 8
+  index: 1
+  head_repo_id: 11
+  base_repo_id: 10
+  head_user_name: user13
+  head_branch: branch2
+  base_branch: master
+  merge_base: 0abcb056019adb83
+  has_merged: false