Add option in e2e testing to allow secure boot to be disabled for windows

[juliusl]

Is your feature request related to a problem?/Why is this needed
Windows doesn't allow unsigned drivers to be installed when secure boot is enabled. This makes it possible to test in-development drivers w/ Windows.

Describe the solution you'd like in detail
Check an env. arg in e2e-scenario.sh and edit the uefi settings in the vmss template.

https://learn.microsoft.com/en-us/azure/templates/microsoft.compute/virtualmachinescalesets?pivots=deployment-language-arm-template#securityprofile-1

Describe alternatives you've considered
This is a boot option so it cannot be disabled while the VM is running.

Additional context