update comments and order

[DanRoscigno]

Description

I was confused by the wording about HPA and replicas, I shortened it and I hope it makes sense to everyone, please check.

I also reordered the resources sections to that all of them are in the same order as the FE (requests then limits).

Related Issue(s)

Please list any related issues and link them here.

Checklist

For operator, please complete the following checklist:

• run make generate to generate the code.
• run golangci-lint run to check the code style.
• run make test to run UT.
• run make manifests to update the yaml files of CRD.

For helm chart, please complete the following checklist:

• make sure you have updated the values.yaml
  file of starrocks chart.
• In scripts directory, run bash create-parent-chart-values.sh to update the values.yaml file of the parent
  chart( kube-starrocks chart).