Update auto-deploy-image to v2.28.2

What does this MR do and why?

Updates the version of auto-deploy-image across Auto DevOps with several notable fixes and features. In particular, there is a fix for a severity2 issue, but I'm marking this MR as severity3 as users can already pin the new version using these CI/CD variables.

Fixes:

• Pin bitnami helm repository index for postgresql (severity2)
• Correctly serialize worker command
• Make ingress.className optional

Features:

• Make all ingress.annotations override all default annotations
• You can now override the default deployment's command and entrypoint

For a full list of changes see gitlab-org/cluster-integration/auto-deploy-image@v2.25.0...v2.28.2

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