Add Cilium on AKS Overlay e2e scenario

[camrynl]

Reason for Change:

-Adding new target to hack/swift/Makefile to build AKS Overlay cluster. -Creating e2e tests for Cilium on AKS Overlay

Issue Fixed:

Requirements:

• [ ] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests

Notes:

[tamilmani1989]

Lets hold on to this PR until we have BYO cni overlay support

[timraymond]

@camrynl Given @tamilmani1989 's comment above, please mark this as a draft until it's ready to merge.