Move filters to pkg/filters

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

core/metadata/images_test.go

@@ -24,8 +24,8 @@ import (
 	"time"
 
 	"github.com/containerd/containerd/v2/core/images"
-	"github.com/containerd/containerd/v2/filters"
 	"github.com/containerd/containerd/v2/pkg/errdefs"
+	"github.com/containerd/containerd/v2/pkg/filters"
 	"github.com/opencontainers/go-digest"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 )