feat(arm): add CKV_AZURE_168 to ensure that Azure Kubernetes Cluster (AKS) nodes should use a minimum number of 50 pods

[tehila86127]

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Description

added a new arm policy to ensure that Azure Kubernetes Cluster (AKS) nodes should use a minimum number of 50 pods

Fixes # (issue)

New/Edited policies (Delete if not relevant)

Description

Include a description of what makes it a violation and any relevant external links.

Fix

How does someone fix the issue in code and/or in runtime?

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[ChanochShayner]

Looks good!