Flatbuffers Dependency Issue

### Description

This is not an issue in our repo, this ticket is for tracking.

It seems there is a problem with the flatbuffers package. I have recreated it in https://github.com/MaciejKaszynski/fbs_problem.
https://github.com/google/flatbuffers/issues/9064

Just pulling the flatbuffers dependency causes
```bash
module extension @@grpc+//bazel:grpc_deps.bzl%grpc_repo_deps_ext does not generate repository "com_envoyproxy_protoc_gen_validate", yet it is imported as "com_envoyproxy_protoc_gen_validate" in the usage at https://bcr.bazel.build/modules/grpc-java/1.66.0/MODULE.bazel:68:35
```

### Workaround

Running `bazel mod deps --lockfile_mode=update` creates the error but it still generates a correct lock file.
So just create the lock and commit normally.

### Analysis results

_No response_

### Solution

Need to wait for opensource Flatbuffers to fix.

### Error Occurrence Rate

When updating lock file.

### How to reproduce

`bazel mod deps --lockfile_mode=update`

### Supporting Information

_No response_

### Classification

Minor

### First Affected Release

not released (main)

### Last Affected Release

not released (main)

### Expected Fixed Release

before release (main)

### Category

- [ ] Safety Relevant
- [ ] Security Relevant