Actions Runner rest api (#33873)

Implements runner apis based on
https://docs.github.com/en/rest/actions/self-hosted-runners?apiVersion=2022-11-28#list-self-hosted-runners-for-an-organization

- Add Post endpoints for registration-token, google/go-github revealed
this as problem
  - We should deprecate Get Endpoints, leaving them for compatibility
- Get endpoint of admin has api path /admin/runners/registration-token
that feels wrong, /admin/actions/runners/registration-token seems more
consistent with user/org/repo api
- Get Runner Api
- List Runner Api
- Delete Runner Api

- Tests admin / user / org / repo level endpoints

Related to #33750 (implements point 1 and 2)
Via needs discovered in #32461, this runner api is needed to allow
cleanup of runners that are deallocated without user interaction.

---------

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

services/convert/convert.go

@@ -30,6 +30,8 @@ import (
 	"code.gitea.io/gitea/modules/util"
 	asymkey_service "code.gitea.io/gitea/services/asymkey"
 	"code.gitea.io/gitea/services/gitdiff"
+
+	runnerv1 "code.gitea.io/actions-proto-go/runner/v1"
 )
 
 // ToEmail convert models.EmailAddress to api.Email
@@ -252,6 +254,30 @@ func ToActionArtifact(repo *repo_model.Repository, art *actions_model.ActionArti
 	}, nil
 }
 
+func ToActionRunner(ctx context.Context, runner *actions_model.ActionRunner) *api.ActionRunner {
+	status := runner.Status()
+	apiStatus := "offline"
+	if runner.IsOnline() {
+		apiStatus = "online"
+	}
+	labels := make([]*api.ActionRunnerLabel, len(runner.AgentLabels))
+	for i, label := range runner.AgentLabels {
+		labels[i] = &api.ActionRunnerLabel{
+			ID:   int64(i),
+			Name: label,
+			Type: "custom",
+		}
+	}
+	return &api.ActionRunner{
+		ID:        runner.ID,
+		Name:      runner.Name,
+		Status:    apiStatus,
+		Busy:      status == runnerv1.RunnerStatus_RUNNER_STATUS_ACTIVE,
+		Ephemeral: runner.Ephemeral,
+		Labels:    labels,
+	}
+}
+
 // ToVerification convert a git.Commit.Signature to an api.PayloadCommitVerification
 func ToVerification(ctx context.Context, c *git.Commit) *api.PayloadCommitVerification {
 	verif := asymkey_service.ParseCommitWithSignature(ctx, c)