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/actions/run_test.go

@@ -30,6 +30,6 @@ func TestUpdateRepoRunsNumbers(t *testing.T) {
 	err = UpdateRepoRunsNumbers(t.Context(), repo)
 	assert.NoError(t, err)
 	repo = unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 4})
-	assert.Equal(t, 4, repo.NumActionRuns)
+	assert.Equal(t, 5, repo.NumActionRuns)
 	assert.Equal(t, 3, repo.NumClosedActionRuns)
 }