Problem Statement
There are two separate problem statements:

1. There are multiple failures seen during VM creation with the error signature Failed to cleanup seed iso disk
2. We see empty DVD drive after VM deployment after mocguestagentcerts.iso is detached

Proposed Solution
MOC telemetry to find the causes for this failure is as follows:

cluster('aeoprodtelemetry.eastus.kusto.windows.net').database('Telemetry').MocNodeAgentUsage
| where TIMESTAMP >= ago(90d)
| where ErrorMessage contains "Failed to cleanup seed iso disk"
| project TIMESTAMP, AEOAssemblyBuild, Operation, ErrorMessage, ErrorStackTrace
| order by AEOAssemblyBuild desc, TIMESTAMP desc

Majority of the occurrences fall under the following categories

1. Not Found - 121 occurrences
2. Pending - 104 occurrences

The solution is as follows:
Fix the Not Found and Pending errors - wmi repository
Remove the 2nd ISO cleanup call - wssdagent repository

The solution for the ghost DVD drives is to remove all empty DVD drives at the end of VM deployment

Testing

E2E VM BVT

Manual VM CRUD for Gen2 VMs

VM Migration E2E tests for Gen1 coverage