Image Mode behaves differently depending on if a MC creates a new file or configures kernelargs.

The current test case "70125-[P2][OnCLayer] Test patch annotation way of updating a paused pool" tests that we can manually update a worker pool when we create a MC deploying a new file. It means that ImageMode and Non-ImageMode will behave similarly because no new osImage will be generated.

Nevertheless, when using a MC that configures kernelargs, a new image is generated and we need to update the DesiredImage annotation too. In order to cover this scenario we need to create a new test case and automate it.