Add gRPC and cli queries for host/controller parameters

[colin-axner]

Summary

Followup to #566. A gRPC and cli should be added for host parameters and controller parameters. The code changes for each can be done in separate pr's (just host or controller at one time). It is even fine to just do cli or gRPC changes

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[colin-axner]

will be closed by #578

[gjermundgaraba]

This issue was mistakenly reopened during some integration work, so closing again now.