ec2_vpc_igw: migrate to boto3 (#45346)
ec2_vpc_igw: migrate to boto3 (#45346)

* ec2_vpc_igw: draft migrate to boto3

* ec2_vpc_igw: migrate to boto3

* ec2_vpc_igw: fix error and implement code review

* ec2_vpc_igw: always catch BotoCoreError with ClientError, remove unused fail method

* ec2_vpc_igw: fix pep error

thaim/ansible,thaim/ansible