Eventually `VMOpts` should be defined as `map[string]any`, and `QEMUOpts` should be moved to `pkg/qemu`.

[unsuman]

          Eventually `VMOpts` should be defined as `map[string]any`, and `QEMUOpts` should be moved to `pkg/qemu`.

Can be another PR.

Originally posted by @AkihiroSuda in #3500 (comment)

[unsuman]

I will work on this.