Add ElasticsearchDiskSpaceLow to ignored alerts

[seunghun1ee]

As AIO volumes are small, disk usage can be more than 80%

[gemini-code-assist]

Summary of Changes

Hello @seunghun1ee, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Prometheus alert configuration to ignore the ElasticsearchDiskSpaceLow alert specifically for controller0. This modification is crucial for environments with small AIO volumes, where high disk usage is expected and does not necessarily indicate a critical issue, thereby reducing alert fatigue and focusing attention on genuine problems.

Highlights

• Alert Configuration: The ElasticsearchDiskSpaceLow alert has been added to the list of ignored alerts for controller0 within the Prometheus test configuration.
• Reasoning for Change: This change addresses frequent false positive alerts due to the intentionally small AIO volumes, which often result in disk usage exceeding 80%.

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[seunghun1ee]

Example: https://github.com/stackhpc/stackhpc-kayobe-config/actions/runs/19168198276?pr=1912

[gemini-code-assist]

Code Review

This pull request adds ElasticsearchDiskSpaceLow to the list of ignored Prometheus alerts for AIO environments, which is a reasonable change given the small volume sizes. My review includes one suggestion to improve the clarity and maintainability of the ignored alerts list by reorganizing the related comments, as the current change makes one of them potentially misleading.

[seunghun1ee]

Oh wow that was fast. I was writing a message for requesting review