Add workflow_run api + webhook (#33964)

Implements 
- https://docs.github.com/en/rest/actions/workflow-jobs?apiVersion=2022-11-28#list-jobs-for-a-workflow-run--code-samples
- https://docs.github.com/en/rest/actions/workflow-jobs?apiVersion=2022-11-28#get-a-job-for-a-workflow-run--code-samples
- https://docs.github.com/en/rest/actions/workflow-runs?apiVersion=2022-11-28#list-workflow-runs-for-a-repository
- https://docs.github.com/en/rest/actions/workflow-runs?apiVersion=2022-11-28#get-a-workflow-run
  - `/actions/runs` for global + user + org (Gitea only)
  - `/actions/jobs` for global + user + org + repository (Gitea only)
  - workflow_run webhook + action trigger
    - limitations
- workflow id is assigned to a string, this may result into problems in
strongly typed clients

Fixes
- workflow_job webhook url to no longer contain the `runs/<run>` part to
align with api
- workflow instance does now use it's name inside the file instead of
filename if set

Refactoring
- Moved a lot of logic from workflows/workflow_job into a shared module
used by both webhook and api

TODO
- [x] Verify Keda Compatibility
- [x] Edit Webhook API bug is resolved
 
Closes https://github.com/go-gitea/gitea/issues/23670
Closes https://github.com/go-gitea/gitea/issues/23796
Closes https://github.com/go-gitea/gitea/issues/24898
Replaces https://github.com/go-gitea/gitea/pull/28047 and is much more
complete

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/structs/hook.go

@@ -470,6 +470,22 @@ func (p *CommitStatusPayload) JSONPayload() ([]byte, error) {
 	return json.MarshalIndent(p, "", "  ")
 }
 
+// WorkflowRunPayload represents a payload information of workflow run event.
+type WorkflowRunPayload struct {
+	Action       string             `json:"action"`
+	Workflow     *ActionWorkflow    `json:"workflow"`
+	WorkflowRun  *ActionWorkflowRun `json:"workflow_run"`
+	PullRequest  *PullRequest       `json:"pull_request,omitempty"`
+	Organization *Organization      `json:"organization,omitempty"`
+	Repo         *Repository        `json:"repository"`
+	Sender       *User              `json:"sender"`
+}
+
+// JSONPayload implements Payload
+func (p *WorkflowRunPayload) JSONPayload() ([]byte, error) {
+	return json.MarshalIndent(p, "", "  ")
+}
+
 // WorkflowJobPayload represents a payload information of workflow job event.
 type WorkflowJobPayload struct {
 	Action       string             `json:"action"`