feat: switch to dandydeveloper/redis-ha chart 🚀

[tuunit]

This pull request updates the Helm chart for oauth2-proxy to replace the Bitnami Redis subchart with the dandydeveloper/redis-ha chart, updates the chart version, and adjusts related configuration and test files accordingly. The changes ensure compatibility with the new Redis chart and improve clarity in configuration.

Redis chart migration and configuration:

• Replaced the Bitnami Redis subchart with the dandydeveloper/redis-ha chart in Chart.yaml dependencies and updated the repository references in .github/workflows/release.yaml and ct.yaml.
• Updated Redis-related configuration in values.yaml and CI test values files to align with redis-ha parameters, including new recommended settings and documentation links.
• Modified helper templates and deployment logic to support redis-ha, including updates to fullname generation and Redis URL construction.

Chart version and metadata updates:

• Bumped the chart version to 8.0.0 in Chart.yaml and updated the changelog annotation to reflect the Redis chart migration.

Alternative to #330

and another solution for #323

[Copilot]

Pull Request Overview

This PR switches from the Bitnami Redis chart to the dandydeveloper/redis-ha chart for Redis deployment in oauth2-proxy. This change provides a more suitable Redis High Availability solution while maintaining backwards compatibility for existing configurations.

• Replace Bitnami Redis chart dependency with dandydeveloper/redis-ha chart
• Update configuration structure to match new chart's parameters
• Fix template logic for Redis authentication and connection handling

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
helm/oauth2-proxy/Chart.yaml	Updates chart version and replaces Redis dependency with redis-ha chart
helm/oauth2-proxy/values.yaml	Updates Redis configuration comments and formatting to match new chart structure
helm/oauth2-proxy/templates/deployment.yaml	Fixes Redis authentication check logic
helm/oauth2-proxy/templates/_helpers.tpl	Updates Redis connection templates for new chart naming conventions
helm/oauth2-proxy/ci/*.yaml	Updates CI test configurations to use new Redis chart parameters
ct.yaml	Changes chart repository from Bitnami to dandydeveloper
.github/workflows/release.yaml	Updates Helm repository configuration for releases

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