grpc: necessary host-tool protobuf does not compile with recent host tools (e.g. g++ 13)

[skalk]

After upgrading our build/test infrastructure to a more recent Ubuntu 24.04 with gcc/g++ 13.3.0 and cmake 3.28.3 the host tool protobuf, which should be build by tool/tool_chain_protobuf, is not able to compile anymore. Therefore, we cannot compile and test the grpc package on a nightly base.

@trimpim @a-dmg @sidhussmann FYI: for now, I have disabled the automatic build of the grpc package. Once the host-tool builds again, I would re-enable it.

[trimpim]

@skalk thanks for the heads up. I did have a short look in to this. we will have to update to a more recent version of protobuf and gRPC.

As our current project doesn't need any of these two libraries I have to schedule this work to later (probably after 25.08).

I'm fine with you having the tests disabled, we run our own test for some old projects.

I will keep you updated on our progress regarding this.