fix: replace AKS LTS versioning with commonly reached k8s patch version

[jpayne3506]

Reason for Change:

AKS LTS versioning now sets its kubernetes patch version to A.BC.1DE instead of the expected A.BC.DE

This broke the automation for upstream k8s-e2e test suite downloads as we leveraged the cluster versioning for the test we were going to run.

Issue Fixed:

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• relevant PR labels added

Notes:
Needs to be forwardported

[jpayne3506]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[Copilot]

Pull Request Overview

This PR fixes an issue with AKS LTS versioning where the Kubernetes patch version format changed from A.BC.DE to A.BC.1DE, breaking automated downloads of upstream k8s-e2e test suites. The fix detects LTS versions (patch version >= 100) and normalizes them to a commonly available patch version (.12) from upstream Kubernetes.

Key changes:

• Added logic to detect AKS LTS versions by checking if the patch version is >= 100
• Implemented normalization to use patch version .12 for LTS versions to match available upstream test artifacts

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
.pipelines/cni/k8s-e2e/k8s-e2e.jobs.yaml	Added LTS version detection and normalization logic before downloading k8s test artifacts
.pipelines/cni/k8s-e2e/k8s-e2e-job-template.yaml	Added identical LTS version detection and normalization logic

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[jpayne3506]

/azp run Azure Container Networking PR

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}