Ensure 'AWSSupportServiceRolePolicy' policy does not use 'v20' policy version

On December 22, 2021, AWS deployed a new version (v20) of the AWS-managed policy 'AWSSupportServiceRolePolicy' that is used by the IAM Role 'AWSServiceRoleForSupport'. In this new version, AWS added the 's3:getObject' action to the policy, which grants the AWS support team access to all S3 Bucket data.