F-558: Add missing paramters in OS section of VM template

[jaypif]

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Description

This PR adds support for missing OS section in VM template. It aligns the OS section with the Documentation:
https://docs.opennebula.io/6.10/management_and_operations/references/template.html?highlight=firmware#os-and-boot-options-section

A correct fix consist in updating GOCA OSVec structure to reflec the Documentation
A dedicated issue has bee openned in the Goca Repo: OpenNebula/one#6782

References

#558

New or Affected Resource(s)

• opennebula_XXXXX

Checklist

• I have created an issue and I have mentioned it in References
• My code follows the style guidelines of this project (use go fmt)
• My changes generate no new warnings or errors
• I have updated the unit tests and they pass succesfuly
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation (if needed)
• I have updated the changelog file

[github-actions]

This pull request is stale because it has been open for 30 days with no activity and it is not in a milestone. Remove 'status: stale' label or comment, or this will be closed in 5 days.

[jschoewe]

Why does this keep getting stale and closed? Some of us have templates that need secure boot enabled in order to boot them after they're cloned. The work looks done, these fields were added to the one GOCA 2 months ago:
OpenNebula/one#6795
OpenNebula/one#6782

That issue was closed and added to the latest enterprise release (6.10.2) a month ago:
https://github.com/OpenNebula/one/milestone/80?closed=1

I cloned the branch from this PR, merged master into it, built the provider using this updated code, and tested it on Open Nebula 6.10.2.

It works great, I also tested on an earlier version (6.10.0) and that still works too. These new fields aren't required, this PR doesn't contain breaking changes, building and using a forked provider is a pain, people have been waiting months for this, I don't see any reason not to merge it anymore.

Merge this now please!

 
Testing:

Open Nebula version:

Terraform apply result:

Cloned template new OS fields 6.10.2:

The OS fields for older versions will look like this and still work:

[github-actions]

This pull request is stale because it has been open for 30 days with no activity and it is not in a milestone. Remove 'status: stale' label or comment, or this will be closed in 5 days.

[aleixrm]

Verified, LGTM