…o OCP 5.0

Create a cilium-cni-override ConfigMap with cniVersion 0.4.0 to work around the CNI 0.3.1 incompatibility (OCPBUGS-86033). Mount the override into the cilium agent via readCniConf/extraVolumes and drop the now-redundant cni.chainingMode flag.

Also extend the network-policies version gate to include OCP 5.0.

Ref: https://redhat.atlassian.net/browse/OCPBUGS-86033

/hold

Summary by CodeRabbit

This PR updates the OpenShift HyperShift CI infrastructure to work around a Cilium CNI compatibility issue (OCPBUGS-86033) by introducing a CNI configuration override mechanism for test environments.

Main Changes:

Cilium Installation Step (cucushift-hypershift-extended-cilium-commands.sh):

• Adds a cilium-cni-override ConfigMap that explicitly sets cniVersion to 0.4.0, working around an incompatibility with CNI version 0.3.1
• Updates the Cilium agent installation to mount and use this override configuration via the cni.readCniConf parameter
• Configures the override as an extra volume in the Cilium pod deployment
• Removes the cni.chainingMode=portmap flag from the installation arguments, as it's now handled by the override ConfigMap

Network Policy Workarounds (network-policies-commands.sh):

• Extends the version gate for Cilium/NetworkPolicy workarounds to include both OCP 4.22 and 5.0 (previously only 4.22)
• This ensures the necessary workarounds are applied in both supported release branches

CI Configuration Updates (openshift-hypershift-release-{4.23,5.0}__periodics.yaml):

• Removes the TEST_SKIPS configuration from the e2e-aws-conformance-cilium periodic test jobs for both 4.23 and 5.0 release branches
• This simplifies the job configuration while maintaining the core test workflow

Practical Impact: These changes enable the HyperShift CI/CD pipeline to properly test Cilium networking in OpenShift environments by ensuring correct CNI version compatibility, while also preparing the infrastructure for OCP 5.0 support.