template_to_instance: Actually use hypervisor params

Previously hvparams were set on the template, yet never passed to the RAPI!
This should fix quite a lot of complaints.

refs #14043
Show disk template in vm detail page

Move Disk type out of per disk row, and moved above list of disks.

refs #14043
Allow user to not boot vm in creation

refs #14043
Add iallocator to create vm

refs #14043
Add help text to no_install

refs #14043
Fix helptips on checkbox items in wizard.

refs #14043