Azure: Adding resource limits for container

Adding CPU & Memory Limits for Workflow service Container

Currently there are no resource limits set on the AKS container. Without specifying any limits resources might be over committed or in case of memory the entire node's memory is available for the AKS pod with default configuration, therefore it's relevant to specify proper limits

From the perf runs we did for CPU 1000m (1 core) seems to optimal as we are at 60-65% CPU for 95th percentile at high load (50 RPS)

For memory 2Gi seems optimal