chore(deps): update grpc-protobuf major dependencies to v30 (alpha) (major)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
build.buf.gen:getstrm_pace_protocolbuffers_java	25.3.0.2 -> 30.2.0.1
build.buf.gen:getstrm_pace_protocolbuffers_kotlin	25.3.0.2 -> 30.2.0.1

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