Remove AWS credential check from cloudwatch output (#3583)
Remove AWS credential check from cloudwatch output (#3583)

This method is reported to not work with IAM Instance Profiles, and we
do not want to make any calls that would require additional permissions.

(cherry picked from commit 5b40173bcb355a8186e543023517e45d2f35bccf)

aristanetworks/telegraf,aristanetworks/telegraf,aristanetworks/telegraf