[ec2-controller] combine Security Group rules creation/deletion API calls

[petrokashlikov]

Is your feature request related to a problem?
Currently ec2-controller is issuing separate API call(AuthorizeSecurityGroupIngress, AuthorizeSecurityGroupEgress, RevokeSecurityGroupIngress, RevokeSecurityGroupEgress) per each Ingress or Egress rule. This presents a problem when you operate at scale and would like to manage large amount of Security Groups with rules in them. AWS API's are being heavily throttled even when you raise limits.

Describe the solution you'd like
Combine creation/deletion of rules under API calls. This API's allow up to 1000 rules per call.