Validate testing on AIX 7.3 #61660
Description
We do not currently have AIX 7.3 systems active in the CI. We do have two AIX 7.3 machines available and since this has been available for several years it makes sense to ensure that it is tested and that we understand if there are any problems on that version of the operating system.
This issue will cover test execution on the platform (outside jenkins for now) and then the activation of machines in the CI to allow it to be tested.