Make api a Go sub-module

Allow the api to stay at the same v1 go package name and keep using a
1.x version number. This indicates the API is still at 1.x and allows
sharing proto types with containerd 1.6 and 1.7 releases.

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

internal/cri/server/events/events.go

@@ -27,7 +27,7 @@ import (
 	"github.com/containerd/typeurl/v2"
 	"k8s.io/utils/clock"
 
-	eventtypes "github.com/containerd/containerd/v2/api/events"
+	eventtypes "github.com/containerd/containerd/api/events"
 	"github.com/containerd/containerd/v2/core/events"
 	"github.com/containerd/containerd/v2/internal/cri/constants"
 )

internal/cri/server/events/events_test.go

@@ -20,7 +20,7 @@ import (
 	"testing"
 	"time"
 
-	eventtypes "github.com/containerd/containerd/v2/api/events"
+	eventtypes "github.com/containerd/containerd/api/events"
 	"github.com/containerd/containerd/v2/pkg/protobuf"
 	"github.com/containerd/typeurl/v2"
 	"github.com/google/go-cmp/cmp"