Move runc shim implementation to cmd

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

cmd/containerd-shim-runc-v2/task/plugin/plugin_linux.go

@@ -0,0 +1,49 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package plugin
+
+import (
+	"github.com/containerd/containerd/v2/cmd/containerd-shim-runc-v2/task"
+	"github.com/containerd/containerd/v2/pkg/shutdown"
+	"github.com/containerd/containerd/v2/plugins"
+	"github.com/containerd/containerd/v2/runtime/v2/shim"
+	"github.com/containerd/plugin"
+	"github.com/containerd/plugin/registry"
+)
+
+func init() {
+	registry.Register(&plugin.Registration{
+		Type: plugins.TTRPCPlugin,
+		ID:   "task",
+		Requires: []plugin.Type{
+			plugins.EventPlugin,
+			plugins.InternalPlugin,
+		},
+		InitFn: func(ic *plugin.InitContext) (interface{}, error) {
+			pp, err := ic.GetByID(plugins.EventPlugin, "publisher")
+			if err != nil {
+				return nil, err
+			}
+			ss, err := ic.GetByID(plugins.InternalPlugin, "shutdown")
+			if err != nil {
+				return nil, err
+			}
+			return task.NewTaskService(ic.Context, pp.(shim.Publisher), ss.(shutdown.Service))
+		},
+	})
+
+}