Loki Helm Chart does not support extraArgs for gateway component

[rkdutta]

Describe the bug
I am using Loki helm chart v6.29.0.
In the main values.yaml I can see that it supports extraArgs. But I do not find it in the deployment manifest.

To Reproduce
Steps to reproduce the behavior:

1. Started Loki (SHA or version)
2. Started Promtail (SHA or version) to tail '...'
3. Query: {} term

Expected behavior
The loki gateway deployment manifest should allow overriding the CLI arguments using extraArgs.

Environment:

• Infrastructure: [e.g., Kubernetes, bare-metal, laptop]
• Deployment tool: [e.g., helm, jsonnet]

Screenshots, Promtail config, or terminal output
If applicable, add any output to help explain your problem.