feat: Implementation of the cpu_options block and addition of support for AMD SEV-SNP

[schniber]

Description

I have implemented the fix for the deprecation warning of cpu_core_count and cpu_threads_per_core attributes. Those can now be specified using the cpu_options block.

In addition, this PR adds the support for AMD SEV-SNP which is also a new attribute that can be set via the cpu_options block.

Motivation and Context

• Resolves #332
• Resolves #333

Breaking Changes

Yes, customers can no longer use the cpu_core_count and cpu_threads_per_core variables anymore. Those have been removed in favor of a new variable cpu_options that can be used as below:

cpu_options = {
    core_count       = 2
    threads_per_core = 1
}

How Has This Been Tested?

• [X] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [X] I have tested and validated these changes using one or more of the provided examples/* projects
• [X] I have executed pre-commit run -a on my pull request

[antonbabenko]

This PR is included in version 5.1.0 :tada:

[github-actions[bot]]

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