* Allow the userdata template to be replaced
* Address fmt issue
* Rename 'customer_userdata' name to 'userdata_template_file'
* Add support for userdata_template_extra_args
* Add support for userdata_template_extra_args
* fix merge conflicts
* Fix merge problem that dropped the file load
Add `platform` to the template expansion context
Add `userdata_launch_template` to `launch_template_userdata`
