Description of problem:

Currently, there is no option to add/select existing keypair while provisioning EC2 instance.

Instead, currently a key pair generated/assigned to each compute resource and all instances are assigned with the same keypair. and get's added to "ec2-user" or ssh user authorized keys file.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Provision ec2 instance using Satellite 6
2.
3.

Actual results:

the instance will be provisioned with keypair generated for Compute resource
and with a naming convention of foreman-<ID>

Expected results:

Should be able to list and choose EC2 key-pairs while creating NEW-HOST

Additional info: