Inject version when building and report version to Gitea via log and header (#43)

close #42
1. Inject runner version when `make build`
After building, executing command line: `./act_runner -v` or `./act_runner --version`, the version of runner is printed.
![image](/attachments/e25efbd3-79b3-49a5-b93f-42646d42c707)

2. In `Actions` UI:
![image](/attachments/36c57470-2a1d-4796-9eb0-de3988ab88e1)

3. Set request header in http client interceptor.

Co-authored-by: sillyguodong <[email protected]>
Reviewed-on: https://gitea.com/gitea/act_runner/pulls/43
Reviewed-by: delvh <[email protected]>
Reviewed-by: Jason Song <[email protected]>
Co-authored-by: sillyguodong <[email protected]>
Co-committed-by: sillyguodong <[email protected]>

runtime/runtime.go

@@ -16,6 +16,7 @@ import (
 // Runner runs the pipeline.
 type Runner struct {
 	Machine       string
+	Version       string
 	ForgeInstance string
 	Environ       map[string]string
 	Client        client.Client
@@ -30,7 +31,7 @@ func (s *Runner) Run(ctx context.Context, task *runnerv1.Task) error {
 		env[k] = v
 	}
 	env["ACTIONS_CACHE_URL"] = s.CacheHandler.ExternalURL() + "/"
-	return NewTask(s.ForgeInstance, task.Id, s.Client, env, s.platformPicker).Run(ctx, task, s.Machine)
+	return NewTask(s.ForgeInstance, task.Id, s.Client, env, s.platformPicker).Run(ctx, task, s.Machine, s.Version)
 }
 
 func (s *Runner) platformPicker(labels []string) string {