aws_iam_policy_attachment
creates an exclusive attachment of IAM
policies. If the IAM policy is attached to any other user(s), role(s) and/or
group(s) via another aws_iam_policy_attachment
the original user(s),
role(s) and/or group(s) will get the attached IAM policy revoked.
aws_iam_role_policy_attachment
, aws_iam_user_policy_attachment
and
aws_iam_group_policy_attachment
can be always used instead and do not have
any exclusive attachment.