Move plugin type definitions to containerd plugins package

The plugins packages defines the plugins used by containerd.
Move all the types and properties to this package.

Signed-off-by: Derek McGowan <derek@mcg.dev>

integration/client/container_linux_test.go

@@ -38,7 +38,7 @@ import (
 	"github.com/containerd/containerd/containers"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/oci"
-	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/plugins"
 	"github.com/containerd/containerd/runtime/v2/runc/options"
 	"github.com/containerd/containerd/sys"
 
@@ -1028,7 +1028,7 @@ func TestContainerRuntimeOptionsv2(t *testing.T) {
 		ctx, id,
 		WithNewSnapshot(id, image),
 		WithNewSpec(oci.WithImageConfig(image), withExitStatus(7)),
-		WithRuntime(plugin.RuntimeRuncV2, &options.Options{BinaryName: "no-runc"}),
+		WithRuntime(plugins.RuntimeRuncV2, &options.Options{BinaryName: "no-runc"}),
 	)
 	if err != nil {
 		t.Fatal(err)

integration/client/container_test.go

@@ -39,7 +39,7 @@ import (
 	"github.com/containerd/containerd/namespaces"
 	"github.com/containerd/containerd/oci"
 	"github.com/containerd/containerd/platforms"
-	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/plugins"
 	gogotypes "github.com/containerd/containerd/protobuf/types"
 	_ "github.com/containerd/containerd/runtime"
 	"github.com/containerd/containerd/runtime/v2/runc/options"
@@ -172,7 +172,7 @@ func TestContainerStart(t *testing.T) {
 }
 
 func readShimPath(taskID string) (string, error) {
-	runtime := plugin.RuntimePluginV2.String() + ".task"
+	runtime := plugins.RuntimePluginV2.String() + ".task"
 	shimBinaryNamePath := filepath.Join(defaultState, runtime, testNamespace, taskID, "shim-binary-path")
 
 	shimPath, err := os.ReadFile(shimBinaryNamePath)

integration/client/daemon_config_linux_test.go

@@ -29,7 +29,7 @@ import (
 	"github.com/containerd/cgroups/v3"
 	. "github.com/containerd/containerd"
 	"github.com/containerd/containerd/oci"
-	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/plugins"
 	"github.com/containerd/containerd/runtime/v2/runc/options"
 )
 
@@ -55,7 +55,7 @@ version = 2
 	}
 
 	id := t.Name()
-	container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("top")), WithRuntime(plugin.RuntimeRuncV2, &options.Options{
+	container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("top")), WithRuntime(plugins.RuntimeRuncV2, &options.Options{
 		Root: runtimeRoot,
 	}))
 	if err != nil {

integration/failpoint/cmd/containerd-shim-runc-fp-v1/plugin_linux.go

@@ -28,6 +28,7 @@ import (
 	"github.com/containerd/containerd/pkg/failpoint"
 	"github.com/containerd/containerd/pkg/shutdown"
 	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/plugins"
 	"github.com/containerd/containerd/runtime/v2/runc/task"
 	"github.com/containerd/containerd/runtime/v2/shim"
 	"github.com/containerd/ttrpc"
@@ -39,18 +40,18 @@ const (
 
 func init() {
 	plugin.Register(&plugin.Registration{
-		Type: plugin.TTRPCPlugin,
+		Type: plugins.TTRPCPlugin,
 		ID:   "task",
 		Requires: []plugin.Type{
-			plugin.EventPlugin,
-			plugin.InternalPlugin,
+			plugins.EventPlugin,
+			plugins.InternalPlugin,
 		},
 		InitFn: func(ic *plugin.InitContext) (interface{}, error) {
-			pp, err := ic.GetByID(plugin.EventPlugin, "publisher")
+			pp, err := ic.GetByID(plugins.EventPlugin, "publisher")
 			if err != nil {
 				return nil, err
 			}
-			ss, err := ic.GetByID(plugin.InternalPlugin, "shutdown")
+			ss, err := ic.GetByID(plugins.InternalPlugin, "shutdown")
 			if err != nil {
 				return nil, err
 			}