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/migrations/migrations.go

@@ -229,6 +229,8 @@ var migrations = []Migration{
 	NewMigration("add http method to webhook", addHTTPMethodToWebhook),
 	// v87 -> v88
 	NewMigration("add avatar field to repository", addAvatarFieldToRepository),
+	// v88 -> v89
+	NewMigration("add commit status context field to commit_status", addCommitStatusContext),
 }
 
 // Migrate database to current version