Add go build tag to docker_network.go (#44)

Fix the build failure in https://gitea.com/gitea/act_runner/actions/runs/278/jobs/0

Reviewed-on: https://gitea.com/gitea/act/pulls/44
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

act/container/docker_network.go

@@ -1,3 +1,5 @@
+//go:build !(WITHOUT_DOCKER || !(linux || darwin || windows))
+
 package container
 
 import (

act/container/docker_stub.go

@@ -55,3 +55,15 @@ func NewDockerVolumeRemoveExecutor(volume string, force bool) common.Executor {
 		return nil
 	}
 }
+
+func NewDockerNetworkCreateExecutor(name string) common.Executor {
+	return func(ctx context.Context) error {
+		return nil
+	}
+}
+
+func NewDockerNetworkRemoveExecutor(name string) common.Executor {
+	return func(ctx context.Context) error {
+		return nil
+	}
+}