[CAP-3826] Revamp the Kubernetes pods overview dashboard

[AntoineEsteve]

What does this PR do?

Modernizes the Kubernetes Pods Overview dashboard, which has not received a substantial update in a long time. The new dashboard provides clearer pod health, inventory, and resource utilization groups, and it introduces the pod list widget that was not available when the original dashboard was created. This PR should also help with large organisation, where many widgets would previously not load due to the number of series.

The dashboard definitions were validated successfully locally with ddev validate dashboards kubernetes.

Before	After

Motivation

Bring the dashboard up to date with current Kubernetes monitoring capabilities and make pod troubleshooting more actionable, particularly by using the new pod list widget to surface pods requiring attention and CPU- or memory-intensive pods. This work is tracked in CAP-3826.

Review checklist (to be filled by reviewers)

Reviewers can explore a copy of the dashboard with live data on org2, and compare it with the previous version.

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add qa/required if this PR needs QA validation, or qa/skip-qa if it does not. Exactly one of the two is required.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

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[dd-octo-sts]

Validation Report

All 21 validations passed.

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license-headers	Validate Python files have proper license headers	✅
licenses	Validate third-party license attribution list	✅
metadata	Validate metadata.csv metric definitions	✅
models	Validate configuration data models match spec.yaml	✅
openmetrics	Validate OpenMetrics integrations disable the metric limit	✅
package	Validate Python package metadata and naming	✅
qa-label	Validate the pull request declares whether it needs QA for the next Agent release	✅
readmes	Validate README files have required sections	✅
saved-views	Validate saved view JSON file structure and fields	✅
version	Validate version consistency between package and changelog	✅

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