feat: Chained cni conflist with cilium

[jpayne3506]

Reason for Change:

Adds chaining implementation for AzureCNI + Cilium. Intent is for AzureCNI to handle interfaces, routing, ADD and Delete, while Cilium adds CNP, CEP, and eBPF programs on top of interfaces.

Adds:

• chained cni conflist to CNS conflist generator.
• chained cni conflist to CNI Dockerfile
• cni conflist installer daemonset
• doc + manifest(s) for easy install
• Cilium watcher deployment to transpose cilium agent + rbac
• swiftv2 mt-pod deployment

Issue Fixed:

Requirements:

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

Notes:

[Copilot]

Pull Request Overview

This PR adds support for generating chained CNI conflist files with Cilium, enabling AzureCNI to handle interfaces, routing, ADD and DELETE operations while Cilium manages CNP, CEP, and eBPF programs on top.

Key changes:

• Introduces new azurecni-chained-cilium scenario for CNS conflist generation
• Adds AzureCNIChainedCiliumGenerator implementation with corresponding tests
• Provides integration test manifests and documentation for Swift v2 + Cilium setup

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
cns/service/main.go	Adds new scenario constant and case handling for azurecni-chained-cilium
cns/cniconflist/generator.go	Defines AzureCNIChainedCiliumGenerator struct and Close method
cns/cniconflist/generator_linux.go	Implements Generate method for creating chained CNI conflist
cns/cniconflist/generator_windows.go	Adds Windows stub implementation returning not implemented error
cns/cniconflist/generator_linux_test.go	Adds unit test for the new generator
cns/cniconflist/testdata/fixtures/azure-chained-cilium.conflist	Test fixture for expected conflist output
test/integration/manifests/cnsconfig/azclichainedciliumconfigmap.yaml	CNS configuration for chained Cilium setup
test/integration/manifests/cilium/v1.17/cilium-config/cilium-chained-config.yaml	Cilium configuration for chained mode
test/integration/manifests/cilium/netpol/default-allow.yaml	Sample Cilium network policy for testing
test/integration/manifests/swiftv2/mt-deploy.yaml	Test deployment manifest
docs/feature/swift-v2/setup-guide.md	Setup guide for Swift v2 with Cilium

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[github-actions]

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