Create Reasonable Resource Requests and Limits for CHT-Core-4.x

[henokgetachew]

Right now the pods don't have resource limits and resource requests specified.

As a result we run into issues like these from time to time where the pods get evicted.

All pods need to specify sensible resource resource requests and resource constraints.

[henokgetachew]

Additional information from this ticket.

The resource limits applied in that test are (For the couchdb pods):

      containers:
      - name: cht-couchdb-1
        image: public.ecr.aws/medic/cht-couchdb:4.2.0
        resources:
          requests:
            cpu: "1800m"    # About 23% of node CPU
            memory: "7Gi"   # About 24% of node memory
          limits:
            cpu: "2500m"    # About 32% of node CPU
            memory: "9Gi"   # About 31% of node memory

It probably makes sense to make these values configurable via values.yaml since it should depend from machine to machine and users might decide to make them higher/lower based on their own needs.