CORTX-31277: add node_group for data nodes in gconf

[tanujashinde0405]

Problem Statement

• Update generated cluster configuration at provisioning time with node_group set to Kubernetes worker node name

Design

As part of CORTX-29695, the node_group information will be injected at deployment time and available when the initContainer is running the provisioning logic. The cortx-k8s code will inject the Kubernetes worker node name into the initContainer as an environment variable (NODE_NAME) and the Provisioner logic will need to update the generated configuration information to set node_group to the value defined in NODE_NAME environment variable.

Coding

Checklist for Author

• [x] Coding conventions are followed and code is consistent

Testing

Checklist for Author

• [ ] Unit and System Tests are added
• [x] Test Cases cover Happy Path, Non-Happy Path and Scalability
• [x] Testing was performed with RPM

Impact Analysis

Checklist for Author/Reviewer/GateKeeper

• [ ] Interface change (if any) are documented
• [ ] Side effects on other features (deployment/upgrade)
• [x] Dependencies on other component(s)

Review Checklist

Checklist for Author

• [x] JIRA number/GitHub Issue added to PR
• [x] PR is self reviewed
• [x] Jira and state/status is updated and JIRA is updated with PR link
• [x] Check if the description is clear and explained

Documentation

Checklist for Author

• [ ] Changes done to WIKI / Confluence page / Quick Start Guide