Creates a common SetIgnitionFile function in pkg/machine/ignition.go which
creates the new VMFile that will represent the machine's ignition file. It
assigns the VMFile to the provided location.
Creates an IgnitionBuilder type to generate the ignition configuration for a
given virt provider.
[NO NEW TESTS NEEDED]
Signed-off-by: Jake Correnti <jakecorrenti+github@proton.me>