Verified
clusterversion: 4.10.0-0.nightly-2022-06-08-150219

Create machineset with cluster name, availabity set will be created with appending '-as' to the machineset name and the clustername is not added to it.
$ oc get machineset                                                                                                                  
NAME                                                            DESIRED   CURRENT   READY   AVAILABLE   AGE
zhsunazureavailabilit-9s8v6-worker-northcentralus1111111111     1         1         1       1           6m8s

Create machineset with not cluster name, clustername prefixed to avalabilitysets and suffixed with '-as'. due to the 80 character name limit, if the proposed name will be 77 or more characters, truncated the name before adding `-as` 

$ oc get machineset                                                                                                                   
NAME                                                            DESIRED   CURRENT   READY   AVAILABLE   AGE
clusterazureavailabilit-9s8v6-worker-northcentralus1111111111   1         1          1       1          5m12s

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.10.20 bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:5172