[FEATURE] Add Proxies in the setup

[NishantJoshi00]

Description

Add proxy servers for both inbound and outbound traffic, providing more control over the network traffic.
For inbound traffic add a Envoy proxy server on top of the ingress, that is exposed by the cluster.
For outbound traffic add a Squid proxy server and deny any and all outbound traffic directly accessibly from EKS.

Changes

• For ingress, come-up with an approach to fetch the ingress URL exposed by EKS
• For egress, come-up with a way, to insert the proxy url in EKS
• Creating user data for deploying the changes
• Add their respective configuration in S3 buckets and fetch them while constructing images
• Add this in a ASG, and include a LG on top of it