Rename EC2 Auto Enrollment to EC2 Auto Enrollment via AWS Systems Manager

[benarent]

Teleport AWS EC2 Auto Enrollment provides a seamless experience, but it requires AWS Systems Manager. Which isn't always a default of users. Instead it makes assumptions that most accounts already meet the prerequisites.

For someone not using AWS Systems Manager, or not having SSM agent installed. There is a lot of extra work to get this integration to work. While wordy, AWS EC2 Auto Enrollment via Systems Manager is a more true statement for this integration.

[marcoandredinis]

I wonder if we can shorten the name, because, as you said, it's wordy

[benarent]

What if we use SSM instead of the full AWS Systems Manager (SSM). I agree it is a bit wordy.

[milos-teleport]

Another +1 for this, especially because currently if customers try to cross-reference this enrollment type with our integration, they run across this document titled "Configure Teleport to Automatically Enroll EC2 instances", which explains how to set up an EC2 instance with a teleport agent.

[benarent]

@thedevelopnik This should be an easy fix.