Remove parsing GatewayIP and passing down to CNI

[tamilmani1989]

…ture

Reason for Change:

Issue Fixed:

This PR fixes azure-ipam support for aks swift overlay cluster. In AKS swift overlay mode, empty gatewayIP is getting passed from cns to azure-ipam and which is expected. Cilium/Azure CNI really doesn't use this gatewayip. So its better to skip parsing this gatewayIP and passing to Azure CNI

Requirements:

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

Notes:

[rbtr]

for my curiosity, would we use this in an AzCNIv1 scenario where we NAT traffic through the node?

[tamilmani1989]

Cilium E2e pipeline

for my curiosity, would we use this in an AzCNIv1 scenario where we NAT traffic through the node?

nope not really. used only in bridge mode which we deprecated long ago