Add efi_format options to efi_config

[giosh94mhz]

Using this option is possible to create qcow2 EFI disks, instead of the default raw backend.

In previous version of the plugin (with packer 1.9 IIRC), there was a "global" option format = "qcow2" which applied also to EFi disks. When the configuration was changed to disks and efi sections, we lost the ability to set disk to qcow format.

Having EFI disk in qcow2 format is important, because the raw disks prevent snapshot to be taken.

I've searched the tests suite for EFI configuration to attach my changes, but I found none. I'm sorry, but I'm not quite sure how to write a new test, so I had to leave that to you. Of course, I tested the plug-in on our infrastructure (Proxmox 7.4 + Packer 1.11)

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[giosh94mhz]

I've changed the author email address in order to comply with your CLA, but the bot is not happy yet :)

[lbajolet-hashicorp]

Hi @giosh94mhz,

Looks like it is now yes, the second comment it left seems out-of-date, you should be good to go on this front :)

I'll review the PR later today or tomorrow as I'm focusing on something else for now, we'll let the tests run in the meantime and I'll come back with an update later.

Thanks!

[trenta]

Looking forward to this one!

[lbajolet-hashicorp]

Hi @giosh94mhz,

Thanks for the PR! Apologies I didn't review it sooner, I had left a message on the PR, but forgot to come back to it; thanks to @trenta for bumping it up!

I pushed an update to the code since some of the generated documentation was not committed along with the changes, should be good now.

Once the tests are green I'll merge this!

[trenta]

Thanks very much!