Use grpc.netty.shaded instead of grpc.netty

[jja725]

What changes are proposed in this pull request?

Use shaded netty since we can not rely on external netty dependency when integrating Alluxio with Trino codebase

Why are the changes needed?

grpc-netty-shaded is grpc-netty + netty + netty-tcnative all built into one jar. so grpc-netty-shaded allows using a compatible version of Netty without worrying about if Netty is a transitive dependency somewhere else in your app (since Netty is a pretty common dependency). It also is a benefit for vulnerabilities, as upgrading Netty can sometimes be difficult, but with grpc-netty-shaded you can upgrade for gRPC easily.

Does this PR introduce any user facing changes?

na