Upstream googleurl module@0.0.0-221103-dd4080f.envoy to BCR (new module)

### Module
- `googleurl`
- Version: 0.0.0-221103-dd4080f.envoy
- BCR: ❌ Not present (new module required)
- Source: https://github.com/google/gurl

### Patches Applied
- `googleurl.patch` — compiler compatibility fixes (MSVC/clang, GSL annotations, libc++ iterator traits)

### Checklist
- [ ] Draft MODULE.bazel for upstream (google/gurl)
- [ ] PR to source repo to add MODULE.bazel
- [ ] Upstream patches if they fix real bugs
- [ ] Prepare PR to BCR for new module registration
- [ ] Update envoy build to use BCR when ready

### Notes
- Blockers: Upstream repo needs MODULE.bazel and Bazel support
- Patches: https://github.com/envoyproxy/toolshed/blob/main/bazel-registry/modules/googleurl/0.0.0-221103-dd4080f.envoy/patches/googleurl.patch