Inventory: Remove IBMCloud Win2012 Machines

[steelhead31]

Remove the now decomissioned windows2012 machines, which will ber replaced as per: https://github.com/adoptium/infrastructure/issues/3238

Checklist

• [X] commit message has one of the [standard prefixes]
• [X] VPC/QPC not applicable for this PR
• [X] for inventory.yml changes, bastillion/nagios/jenkins updated accordingly