Add resources to proxy sidecar

[TheEvilCoder42]

Based on #46 - Add resources to proxy sidecar, hardcoded for now.

[msftclas]

All CLA requirements met.

[krancour]

Sorry for the delay in responding to this.

The resource requests look a bit higher than what I would have guessed the proxy typically needs (I think the limits look fine).

To be perfectly fair, I don't have hard data on the proxy's resource requirements and haven't bothered to find any because I'm quite certain they're going to vary proportionately to load, but the resource requests being what they are here is going to have a large-ish impact on how many Osiris-enabled pods can be scheduled to a given node. 100m is effectively 10% of a vCPU core and that seems like a lot.

We can lower the requested resources and keep the limits where they are and that won't impact scheduling as much, but will impact the likelihood of pods being evicted from their nodes when resources get tight. (Pods with large discrepancies between resources requested and resource limits are the first to go.) We wouldn't want this either.

I know it was actually my own suggestion to start to solve #46 by hard coding some resource requests and limits, but I am thinking better of that now, considering that our choices are to severely constrain the number of Osiris-enabled workloads per core or else risk evictions. I think we have no reasonable recourse here other than to put this in the hands of the users. i.e. I don't think we can get away with hard coding this after all. You could keep the current numbers as the default, but it would be good to make this tunable via some annotations.