windows: Add code for enabling accounts

This is needed if the Administrator account is locked
windows: Fix the path for the *.cer files

When installing the Virtio drivers, make sure the *.cer files gets
created in the temporary directory where the drivers are hosted.
windows: Disable the first-logon animation

Add a method for disabling the first-logon animation. This will make
Administrator login faster if the Administrator account was previously
locked.
windows: Cleanup the VirtIO driver installation

Add a mechanism in OSBase to add cleanup jobs. Use this mechanism to
cleanup the VirtIO installation.