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/repo_unit.yml

@@ -740,3 +740,10 @@
   type: 10
   config: "{}"
   created_unix: 946684810
+
+-
+  id: 112
+  repo_id: 4
+  type: 10
+  config: "{}"
+  created_unix: 946684810