fix: skip jobs whose if fails to evaluate, update actionslib (#1247)

Updates actionslib to https://gitea.com/gitea/actionslib/releases/tag/v1.2.1.

1. A job whose `if:` fails to evaluate, like `fromJSON` of an invalid job output, is skipped with the error in its log instead of failing, like on GitHub Actions.
1. Workflows the runner reads itself, like with `exec`, are rejected when an expression does not parse, like an unclosed `${{` or an unknown context, instead of failing later.
1. Task payloads from Gitea are read without that check, because they hold evaluated text that may contain `${{`.
1. `if: False`, `if: ~` and other boolean, null or number conditions work.

Gitea PR: https://github.com/go-gitea/gitea/pull/39358

Reviewed-on: https://gitea.com/gitea/runner/pulls/1247
Reviewed-by: bircni <[email protected]>
Co-authored-by: silverwind <[email protected]>

internal/app/run/workflow.go

@@ -15,7 +15,7 @@ import (
 )
 
 func generateWorkflow(task *runnerv1.Task) (*model.Workflow, string, error) {
-	workflow, err := model.ReadWorkflow(bytes.NewReader(task.WorkflowPayload))
+	workflow, err := model.ReadWorkflowPayload(bytes.NewReader(task.WorkflowPayload))
 	if err != nil {
 		return nil, "", err
 	}