An update to Go gRPC Protobuf generation will change service registration function signatures to use an interface instead of a concrete type in generated .pb.go service files. This change should affect very few client library users. See release notes advisories in https://github.com/googleapis/google-cloud-go/pull/11025.
PiperOrigin-RevId: 765227853
fix: Move conformance_service.proto to its own directory to mirror existing go package structure.
feat: Publish an `expr_version` field to track transformations applied during static analysis to the `expr` field within the `CheckedExpr`.
Committer: @TristonianJones
PiperOrigin-RevId: 404145648
