Generate GRPC for runtime sandbox API

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

api/Protobuild.toml

@@ -31,10 +31,18 @@ generators = ["go", "go-ttrpc", "go-fieldpath"]
 prefixes = [
   "github.com/containerd/containerd/runtime/v1/shim/v1",
   "github.com/containerd/containerd/api/runtime/task/v2",
-  "github.com/containerd/containerd/api/runtime/sandbox/v1",
 ]
 generators = ["go", "go-ttrpc"]
 
+[[overrides]]
+prefixes = [
+  "github.com/containerd/containerd/api/runtime/sandbox/v1",
+]
+generators = ["go", "go-ttrpc", "go-grpc"]
+
+[overrides.parameters.go-ttrpc]
+prefix = "TTRPC"
+
 # Aggregrate the API descriptors to lock down API changes.
 [[descriptors]]
 prefix = "github.com/containerd/containerd/api"