Add implicit ingress rule creation for venue-services proxy connection to the management console

[jpl-btlunsfo]

Purpose

• Adding an ingress rule from the venue-services proxy's security group to the previously created Management Console security group
  • This is to ensure connectivity after the Management Console's ALB security group is locked down

Proposed Changes

• ADD ecs_mc_alb_ingress_sg_rule ingress rule to ensure connectivity to ALBSecurityGroup (and the Management Console) deployed by the unity-cs-infra cloudformation template

Issues

• second part of Lock down access of MC, so that outsiders with a URL cannot access it unity-cs#431

Testing

• Manually redeployed on a locked-down management console, and tested connection.

[galenatjpl]

looks great!