feat: add flag to always run the checkout action (#1049)

act has a feature that skips the checkout action to do a remote
checkout when a local checkout exists. in some cases, e.g. when
running act in a CI, you always want to clone the repository.

pkg/runner/run_context.go

@@ -708,6 +708,10 @@ func setActionRuntimeVars(rc *RunContext, env map[string]string) {
 }
 
 func (rc *RunContext) localCheckoutPath() (string, bool) {
+	if rc.Config.NoSkipCheckout {
+		return "", false
+	}
+
 	ghContext := rc.getGithubContext()
 	for _, step := range rc.Run.Job().Steps {
 		if isLocalCheckout(ghContext, step) {