Build: Skip contrib/pyln-grpc-proto ? about lightning HOT 5 OPEN

@daywalker90 are you sure that it is not required also by pyln-client? I remember some hidden dependencies

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Concept ack for this, compile cln on odroid is a very log process due the grpc depencencies

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i believe there is a flag to disable building the rust crates, something like ./configure --disable-rust iirc

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Yes, you can en- or disable rust; but you can not do the same for the gRPC stuff, let alone for the Python modules - which I personally see no use for except perhaps for the built-in REST API, which in return doesn't need any of the gRPC stuff either as it is launched as a plugin that consumes STDIN/STDOUT.

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the grpc stuff IS only from building the rust crate cln-grpc, i'm pretty sure i did not need a protoc compiler or grpc dependencies if i did not build that crate

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