Regenerate Protobuf implementations

Regenerated using:
* github.com/containerd/protobuild@main
  (6b023c693abe4cd44e59ada8bdf496eb2572d9a6 - @latest fails to install)
* github.com/containerd/containerd/cmd/protoc-gen-gogoctrd@latest
  (v1.5.5)
* protoc-3.18.0-win64, with the includes coped to ./protobuf

```bash
go list ./... | grep -v vendor | xargs echo protobuild
```

and then ran the resulting command-line in PowerShell where I had the
rest of my Go setup, because I don't know what the PowerShell equivalent
of xargs is.

Because I did this on Windows, it highlighted a fascinating surprise
behaviour in protobuild, which matches prefixes for its overrides using
filesystem paths, not the module paths. I guess this means every
previous update was done under Linux or a Cygwin-derived environment.

Signed-off-by: Paul "TBBle" Hampson <[email protected]>

Protobuild.toml

@@ -33,17 +33,28 @@ plugins = ["grpc", "fieldpath"]
   "github/containerd/cgroups/stats/v1/metrics.proto" = "github.com/containerd/cgroups/stats/v1"
 
 [[overrides]]
-prefixes = ["github.com/Microsoft/hcsshim/internal/shimdiag"]
+prefixes = [
+  "github.com/Microsoft/hcsshim/internal/shimdiag",
+  "github.com\\Microsoft\\hcsshim\\internal\\shimdiag",
+]
 plugins = ["ttrpc"]
 
 [[overrides]]
-prefixes = ["github.com/Microsoft/hcsshim/internal/computeagent"]
+prefixes = [
+  "github.com/Microsoft/hcsshim/internal/computeagent",
+  "github.com\\Microsoft\\hcsshim\\internal\\computeagent"
+]
 plugins = ["ttrpc"]
 
 [[overrides]]
-prefixes = ["github.com/Microsoft/hcsshim/internal/ncproxyttrpc"]
+prefixes = [
+  "github.com/Microsoft/hcsshim/internal/ncproxyttrpc",
+  "github.com\\Microsoft\\hcsshim\\internal\\ncproxyttrpc"]
 plugins = ["ttrpc"]
 
 [[overrides]]
-prefixes = ["github.com/Microsoft/hcsshim/internal/vmservice"]
+prefixes = [
+  "github.com/Microsoft/hcsshim/internal/vmservice",
+  "github.com\\Microsoft\\hcsshim\\internal\\vmservice"
+]
 plugins = ["ttrpc"]