some containers need resource request specified for Kubernetes

[mmguero]

See resource management for kubernetes

At the very least, the OpenSearch and Logstash containers should be populated at runtime to give resource requests for memory at least as much as the user specified during configuration, so assure those containers don't get assigned to nodes with less than that amount of memory.

[mmguero]

testing the change, here's the output of kubectl describe pod for opensearch and logstash after the change with my system's current values:

...
Containers:
  logstash-container:
...
    State:          Running
      Started:      Tue, 13 Aug 2024 11:06:00 -0600
    Ready:          True
    Restart Count:  0
    Requests:
      memory:  3Gi
...

...
Containers:
  opensearch-container:
...
    State:          Running
      Started:      Tue, 13 Aug 2024 11:06:00 -0600
    Ready:          True
    Restart Count:  0
    Requests:
      memory:  24Gi
...

And a non-modified container is behaving as expected.