`vsphere-clone`: Add support to clone a VM from a template in a content library

This issue was originally opened by @graham1228 as hashicorp/packer#10318. It was migrated here as a result of the Packer plugin split. The original body of the issue is below.

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Description

As a user of the vsphere-clone builder I would like the ability to create a vm from an existing vm template in a content library.

Use Case(s)

We use the content library to store our base OS OVF images and need to be able to utilize these templates to layer on solution specific software leveraging the vsphere-clone builder.

Potential configuration

Utilizing the same configuration item, additionally search in all content libraries for the template name

template (string) - Name of source VM. Path is optional.

Potential References

• https://discuss.hashicorp.com/t/vsphere-clone-from-content-library/11818

Hi community, Any expected ETA on this item?
Would be a great addition to our realm at the moment.

[RP-TSB]

Hello Team, at least an initial response would be nice to know that you are having this issue under your radar.
I recently changed our pipeline to import our resulting templates as OVF into the Content Library and realizing it later can't be used for a subsequent stage was highly disappointing. Many thanks in advance.

[outhex]

Hi, any ETA on this?

[fbecker]

Any news on this? We desperately need this feature...

[teadur]

Would be nice addition to my setup aswell.
@hmalphettes are you working on it ?

[hmalphettes]

@teadur I am not working on this feature at the moment. I think github picked up a reference to my fork when I ran a rebase.
Sorry to leave you hanging here.

[teadur]

@teadur I am not working on this feature at the moment. I think github picked up a reference to my fork when I ran a rebase. Sorry to leave you hanging here.

no worries, I hope you get back to it at one point.

[fbecker]

Just wanted to let you folks know that I'm currently working on this. I have an implementation ready that uses the existing vsphere-clone builder but I'm wondering if it would be more convenient to split this functionality into a new builder, as there are quite a few features (OVF network mappings, OVF properties etc.) that do no apply to regular vm cloning. Also, if there is a need for deploying from local OVF/OVA files, this might be easier to account for.

Any thoughts on this would be greatly appreciated!