internal/distro/rhel9: handle ignition.firstboot for edge

Signed-off-by: Irene Diez <idiez@redhat.com>

internal/ignition/ignition.go

@@ -0,0 +1,12 @@
+package ignition
+
+import "github.com/osbuild/osbuild-composer/internal/blueprint"
+
+type Options struct {
+	ProvisioningURL string
+}
+
+func FromBP(bpIgnitionFirstboot blueprint.FirstBootIgnitionCustomization) *Options {
+	ignition := Options(bpIgnitionFirstboot)
+	return &ignition
+}