Adding CNI v1.21.1 release

[jaydeokar]

What type of PR is this?
release

Which issue does this PR fix?:
N/A

What does this PR do / Why do we need it?:
N/A

Testing done on this change:
N/A

Will this PR introduce any new dependencies?: N/A

Will this break upgrades or downgrades? Has updating a running cluster been tested?:
N/A

Does this change require updates to the CNI daemonset config files to work?: N/A

Does this PR introduce any user-facing change?: N/A

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[Copilot]

Pull request overview

This PR releases version v1.21.1 of the AWS VPC CNI for Kubernetes, which includes a bug fix for the Network Policy Agent and adds support for clusterpolicyendpoints resources. The release updates three components: the CNI plugin from v1.21.0 to v1.21.1, the cni-metrics-helper from v1.21.0 to v1.21.1, and the aws-network-policy-agent from v1.3.0 to v1.3.1.

Key changes:

• Version bumps across all deployment configurations for commercial AWS, GovCloud, and China regions
• Addition of RBAC permissions for clusterpolicyendpoints and clusterpolicyendpoints/status resources
• Updated Helm chart appVersions and documentation

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
scripts/run-cni-release-tests.sh	Updated CNI metrics helper image tag to v1.21.1 in test configuration
scripts/generate-cni-yaml.sh	Updated VPC_CNI_VERSION to v1.21.1 and NODE_AGENT_VERSION to v1.3.1
config/master/cni-metrics-helper.yaml	Updated cni-metrics-helper version labels and image tag to v1.21.1
config/master/cni-metrics-helper-us-gov-west-1.yaml	Updated cni-metrics-helper for US GovCloud West region to v1.21.1
config/master/cni-metrics-helper-us-gov-east-1.yaml	Updated cni-metrics-helper for US GovCloud East region to v1.21.1
config/master/cni-metrics-helper-cn.yaml	Updated cni-metrics-helper for China region to v1.21.1
config/master/aws-k8s-cni.yaml	Updated CNI, init, and node agent versions; added clusterpolicyendpoints RBAC permissions
config/master/aws-k8s-cni-us-gov-west-1.yaml	Updated CNI components for US GovCloud West with new RBAC permissions
config/master/aws-k8s-cni-us-gov-east-1.yaml	Updated CNI components for US GovCloud East with new RBAC permissions
config/master/aws-k8s-cni-cn.yaml	Updated CNI components for China region with new RBAC permissions
charts/cni-metrics-helper/values.yaml	Updated default image tag to v1.21.1
charts/cni-metrics-helper/README.md	Updated documentation to reflect v1.21.1 image tag
charts/cni-metrics-helper/Chart.yaml	Updated appVersion to v1.21.1
charts/aws-vpc-cni/values.yaml	Updated image tags for CNI (v1.21.1), node agent (v1.3.1), and VPC_CNI_VERSION env var
charts/aws-vpc-cni/templates/clusterrole.yaml	Added clusterpolicyendpoints resources and status permissions to ClusterRole
charts/aws-vpc-cni/README.md	Updated documentation to reflect new version numbers
charts/aws-vpc-cni/Chart.yaml	Updated appVersion to v1.21.1
CHANGELOG.md	Added v1.21.1 release entry with bug fix note

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