Description

Part of stackabletech/issues#770
Pulls in stackabletech/operator-rs#1107

IONOS loadbalances don't support the Local traffic policy. so demos and tests didn't work put of the box on IONOS.
This PR changes to safer default (null), see the release notes below.

Release notes

• Breaking: Default ListenerClass .spec.externalTrafficPolicy to null to improve LoadBalancer support across various Kubernetes environments.
  Previously, ListenerClasses used Local by default, which can be more performant, but needs to be supported by the LoadBalancer.
  Setting this field no null forwards the defaulting to the Kubernetes API server, which internally defaults to Cluster.
  This change can result in degraded performance when the field was previously unconfigured, therefore it is marked as a breaking change.
  The field can explicitly be set to Local to restore the old behavior.
  See https://github.com/stackabletech/listener-operator/pull/347[listener-operator#347].

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
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Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker