Updating network policy agent version

[jaydeokar]

What type of PR is this?
doc

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

Bump the AWS Network Policy Agent (node agent) version from v1.2.6 to v1.2.7 across generation scripts, Kubernetes manifests, and Helm chart defaults to align deployments on the newer agent.

• Update NODE_AGENT_VERSION in the generation script.
• Update container image tags in static manifests for standard, GovCloud, and China regions.
• Update Helm chart default nodeAgent.image.tag and README documentation.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
scripts/generate-cni-yaml.sh	Sets NODE_AGENT_VERSION to v1.2.7 to generate manifests with the new node agent version.
config/master/aws-k8s-cni.yaml	Updates aws-eks-nodeagent container image tag to v1.2.7 in the standard manifest.
config/master/aws-k8s-cni-us-gov-west-1.yaml	Updates aws-eks-nodeagent image tag to v1.2.7 for GovCloud (us-gov-west-1).
config/master/aws-k8s-cni-us-gov-east-1.yaml	Updates aws-eks-nodeagent image tag to v1.2.7 for GovCloud (us-gov-east-1).
config/master/aws-k8s-cni-cn.yaml	Updates aws-eks-nodeagent image tag to v1.2.7 for China (cn-northwest-1).
charts/aws-vpc-cni/values.yaml	Bumps default Helm value nodeAgent.image.tag to v1.2.7.
charts/aws-vpc-cni/README.md	Updates the documented default nodeAgent.image.tag to v1.2.7.

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