fix(actions): exclude workflow_call from workflow trigger detection

[Zettat123]

Gitea now only allows workflow_dispatch.inputs. If a workflow contains workflow_call.inputs, the workflow cannot be triggered, even though the on: section contains other trigger events.

gitea/modules/actions/jobparser/model.go

Lines 402 to 405 in 428ee9f

	case yaml.MappingNode:
	if k != "workflow_dispatch" || act != "inputs" {
	return nil, fmt.Errorf("map should only for workflow_dispatch but %s: %#v", act, content)
	}

For example, this workflow cannot be triggered due to workflow_call.inputs:

on:
  push:
  pull_request:
  workflow_call:
    inputs:
      name:
        type: string

---

This PR is extracted from #37478 for backport

[silverwind]

This had missed 2 more variants, I addressed that in 6f7ddac.