[major] Remove deprecated capabilities

[durera]

Removes:

• Airgap v1 support (digest configmaps)
• Support for end of life MAS releases (MAS 8.6 to 8.9)
• Support for catalogs prior to MAS 8.10 GA In April 2023
• convert_to_olm, suite_mustgather, suite_mustgather_download, suite_install_digest_cm roles
• convert_to_olm playbook
• Remove cluster_monitoring role, function replaced by grafana and opentelemetry in their own roles, and move the OCP monitoring configuration code into existing ocp_config role

[whitfiea]

@durera There is still references to the convert_to_olm role in the MAS docuemntation page https://www.ibm.com/docs/en/mas-cd/continuous-delivery?topic=versions-converting-manual-deployment-channel-subscription

What is the alternative for the suite_mustgather role, as that might be used must by any users.

[durera]

There is still references to the convert_to_olm role in the MAS docuemntation page https://www.ibm.com/docs/en/mas-cd/continuous-delivery?topic=versions-converting-manual-deployment-channel-subscription

We should get that cleaned up, ideally removed, or failing that referencing a fixed version of the collection that still supports the conversaion. The supported releases of MAS are all OLM only at this point.

[durera]

What is the alternative for the suite_mustgather role, as that might be used must by any users.

https://ibm-mas.github.io/cli/commands/must-gather/

We replaced the old must-gather with this one a while back now, I've not seen any must-gathers in the old format for a while, and if we did we would respond asking them to run the new must-gather rather than the old one that is used in these roles.