MWAA verify_env script doesn't correctly identify available endpoints

[daniel-bowman-nationwide]

aws-support-tools/MWAA/verify_env/verify_env.py

Line 682 in 2a9b970

vpc_endpoints = [endpoint for endpoint in vpc_endpoints if all(subnet in s_ids for subnet in

In the above line of code the all() method causes the endpoint identification to fail if the endpoint is attached to more subnets than the environment is attached to. The correct approach would be to subtract the subnets the endpoint has from the subnets the environment has and ensure there are none remaining for the environment.