(1.29) Automated cherry pick of #1146: upgraded to ec2 v2, buggy #1157: Update ELB and ELBV2 packages to AWS SDK Go V2 #1169: aws sdk go upgrade #1177: update aws & awserr to go sdk v2

(1.29) Automated cherry pick of #1146: upgraded to ec2 v2, buggy #1157: Update ELB and ELBV2 packages to AWS SDK Go V2 #1169: aws sdk go upgrade #1177: update aws & awserr to go sdk v2 #1371