Added utility function for comparing RHEL version strings.
Conditions added:
- greenboot subpackages were changed between RHEL 8.5 and RHEL 8.6.
- fido client packages aren't available in RHEL prior to 8.6.
- the ec2 SAP image type is not supported in RHEL prior to 8.6.
- the edge-simplified-installer and edge-raw-image image types are not
supported in RHEL prior to 8.6.
- They were previously supported in 8.5 without FDO support, but now
it's dropped from 8.5 completely.
56e6208fcf