Bug: Ignores tags on instance profiles

[andrewjhumphrey]

Also appears to ignore cloudformation suffixes on instance profiles that are lower case.
(see https://buildkite.com/envato-marketplaces/platform-iam-configuration/builds/2315#0181451c-231b-4787-a3f1-7b818181453b) and

aws iam list-instance-profile-tags --instance-profile-name platform-docker-spot-green-InstanceProfile-3YLQsbagLI1q
{
    "Tags": [
        {
            "Key": "iamy-ignore",
            "Value": "true"
        }
    ],
    "IsTruncated": false
}

[orien]

We just hit the instance profile with lower case characters in the suffix.

I see the regex doesn't account for this:

iamy/iamy/cfn.go

Line 16 in 5fdf22c

var cfnResourceRegexp = regexp.MustCompile(`-[A-Z0-9]{10,20}$`)

Of course, if it did, it'd match many non-CFN managed resources.