Upstream perfetto module@53.0.envoy to BCR (blocked on protobuf uprev)

### Module
- `perfetto`
- Version: 53.0.envoy
- BCR: ❌ Not present
- Source: https://github.com/google/perfetto (has MODULE.bazel upstream)
- BCR Request: https://github.com/google/perfetto/issues/2787

### Overlay Applied
- Custom `MODULE.bazel` and `BUILD.bazel` overlay
- Dependencies: rules_cc, bazel_skylib, platforms, protobuf@28.3

### Checklist
- [ ] Track upstream BCR onboarding progress (issue #2787)
- [ ] Verify toolshed overlay vs upstream MODULE.bazel
- [ ] Coordinate/contribute to upstream BCR PR when unblocked
- [ ] Update envoy build once BCR module goes live

### Notes
- Blockers: protobuf uprev required by Android; tracked in google/perfetto#2787
- Overlay: https://github.com/envoyproxy/toolshed/tree/main/bazel-registry/modules/perfetto/53.0.envoy/overlay