ddsched plugin gRPC calls have timeout by default

[justonedev1]

I did this as a proposal, how to add gRPC timeout to all calls in one plugin by default. However I am not sure whether this is desirable, because I found multiple TIMEOUTS in ddsched plugin, some of them are not even used. So I would like to ask @teo what do you think about this.

[teo]

I did this as a proposal, how to add gRPC timeout to all calls in one plugin by default. However I am not sure whether this is desirable, because I found multiple TIMEOUTS in ddsched plugin, some of them are not even used. So I would like to ask @teo what do you think about this.

I agree with this in principle. ddsched is specific because we have to poll for op completion, but the client-side timeout is still missing. Concerning the unused timeout constants, it could be they were planned but never materialized, or were used in a previous version (likely the former).