fix: if the Forgejo instance failed a job, cancel it (#986)

- when the Forgejo instance stops a job because it runs for too long, it will be reported back as failed and it must be stopped, exactly as if it was canceled from the web UI by the user.
- add test coverage for Reporter.ReportState
- extract Reporter.Outputs output of Reporter.ReportState

Resolves https://code.forgejo.org/forgejo/runner/issues/980

---

Manual testing with a locally built Forgejo instance built to check every minute instead of every 30 minutes, with

```ini
[actions]
ENABLED = true
ENDLESS_TASK_TIMEOUT = 1m
```

and the following workflow:

```yaml
on: [push]
jobs:
  test:
    runs-on: docker
    steps:
      - run: sleep 60
      - run: sleep 61
      - run: sleep 62
```

waiting in front of the screen and watching the logs of the runner, I see it stops before `sleep 62` is complete.

<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
  - [PR](https://code.forgejo.org/forgejo/runner/pulls/986): <!--number 986 --><!--line 0 --><!--description Zml4OiBpZiB0aGUgRm9yZ2VqbyBpbnN0YW5jZSBmYWlsZWQgYSBqb2IsIGNhbmNlbCBpdA==-->fix: if the Forgejo instance failed a job, cancel it<!--description-->
<!--end release-notes-assistant-->

Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/986
Reviewed-by: Mathieu Fenniak <mfenniak@noreply.code.forgejo.org>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

internal/pkg/report/reporter.go

@@ -209,6 +209,17 @@ func (r *Reporter) logf(format string, a ...any) {
 	}
 }
 
+func (r *Reporter) GetOutputs() map[string]string {
+	outputs := make(map[string]string)
+	r.outputs.Range(func(k, v any) bool {
+		if val, ok := v.(string); ok {
+			outputs[k.(string)] = val
+		}
+		return true
+	})
+	return outputs
+}
+
 func (r *Reporter) SetOutputs(outputs map[string]string) error {
 	r.stateMu.Lock()
 	defer r.stateMu.Unlock()
@@ -360,13 +371,7 @@ func (r *Reporter) ReportState() error {
 	state := proto.Clone(r.state).(*runnerv1.TaskState)
 	r.stateMu.RUnlock()
 
-	outputs := make(map[string]string)
-	r.outputs.Range(func(k, v any) bool {
-		if val, ok := v.(string); ok {
-			outputs[k.(string)] = val
-		}
-		return true
-	})
+	outputs := r.GetOutputs()
 
 	resp, err := r.client.UpdateTask(r.ctx, connect.NewRequest(&runnerv1.UpdateTaskRequest{
 		State:   state,
@@ -380,7 +385,8 @@ func (r *Reporter) ReportState() error {
 		r.outputs.Store(k, struct{}{})
 	}
 
-	if resp.Msg.GetState().GetResult() == runnerv1.Result_RESULT_CANCELLED {
+	switch resp.Msg.GetState().GetResult() {
+	case runnerv1.Result_RESULT_CANCELLED, runnerv1.Result_RESULT_FAILURE:
 		r.cancel()
 	}