* ec2_instance: ebs_optimized is not sub-option of 'network' (#48341)
* ebs_optimized is not suboption of 'network'
* Add Shaps as ec2_instance maintainer
* Added workaround-backward compatible check for ebs_optimized
* Added ebs_optimized test
* CI fixes, dynamic select of ENA-enabled AMI
(cherry picked from commit b7d9feb7dc)
* Added changlog fragment for PR #48341
* fixed yaml errors in changelog
