Add a doctor command to fix inconsistent run status (#35840)

#35783 fixes an actions rerun bug. Due to this bug, some runs may be
incorrectly marked as `StatusWaiting` even though all the jobs are in
done status. These runs cannot be run or cancelled. This PR adds a new
doctor command to fix the inconsistent run status.

```
gitea doctor check --run fix-actions-unfinished-run-status --fix
```

Thanks to @ChristopherHX  for the test.

models/fixtures/action_task.yml

@@ -197,3 +197,22 @@
   log_length: 707
   log_size: 90179
   log_expired: 0
+-
+  id: 56
+  attempt: 1
+  runner_id: 1
+  status: 3 # 3 is the status code for "cancelled"
+  started: 1683636528
+  stopped: 1683636626
+  repo_id: 4
+  owner_id: 1
+  commit_sha: c2d72f548424103f01ee1dc02889c1e2bff816b0
+  is_fork_pull_request: 0
+  token_hash: 6d8ef48297195edcc8e22c70b3020eaa06c52976db67d39b4240c64a69a2cc1508825121b7b8394e48e00b1bf3718b2aaaab
+  token_salt: eeeeeeee
+  token_last_eight: eeeeeeee
+  log_filename: artifact-test2/2f/47.log
+  log_in_storage: 1
+  log_length: 707
+  log_size: 90179
+  log_expired: 0