Protocol Buffer namespace warnings

I am noticing warnings when I launch the spanner emulator, both in the terminal locally, and when using the `gcr.io/cloud-spanner-emulator/emulator` docker image on a bitbucket pipeline.

```
WARNING: proto: file "google/rpc/status.proto" is already registered
previously from: "[google.golang.org/genproto/googleapis/rpc/status](http://google.golang.org/genproto/googleapis/rpc/status)"
currently from: "unknown"
See https://protobuf.dev/reference/go/faq#namespace-conflict
WARNING: proto: file "google/rpc/status.proto" has a name conflict over google.rpc.Status
previously from: "[google.golang.org/genproto/googleapis/rpc/status](http://google.golang.org/genproto/googleapis/rpc/status)"
currently from: "unknown"
See https://protobuf.dev/reference/go/faq#namespace-conflict
WARNING: proto: message google.rpc.Status is already registered
previously from: "google.golang.org/genproto/googleapis/rpc/status"
currently from: "unknown"
See https://protobuf.dev/reference/go/faq#namespace-conflict
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
```