* Add support for additional disks for config-local
* Restore wrongly deleted lines
* Shellcheck
* add args in the right place dummy
* Fix nits
* typo
* var naming cleanup
* Add stub function for remaining cloud providers
* Add support for Azure instances in testnet creation
* Fixup
* Fix shellcheck errors
* More shellcheck and cleanup node creation and deletion
* More shellcheck and cleanup node creation and deletion
* Fixup instance wait API
* Fix revieew comments and add GPU installation extension