kubernetes fix: do not fail where metadata.name is missing

[eyalatox]

User description

Description

in cases the name field in not present in the metadata section an exception is thrown

Fixes # (issue)

fix case of uncaught exception, passing the policy instead

Checklist:

• I have performed a self-review of my own code

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Generated description

Below is a concise technical summary of the changes proposed in this PR:
Modifies the DefaultNamespace check in the kubernetes_security_checks module to handle cases where the metadata.name field is missing. Improves the robustness of the security validation process for Kubernetes resources.

Topic	Details
Code refactoring	Refactors how the 'name' field is accessed and used in conditional statements Modified files (1) checkov/kubernetes/checks/resource/k8s/DefaultNamespace.py Latest Contributors(2) User Commit Date gruebel chore-fix-flake8-issue... October 11, 2022 YaaraVerner Run-k8s-graph-from-run... December 05, 2021
Exception handling	Adds a check for the existence of the 'name' field in metadata to prevent exceptions Modified files (1) checkov/kubernetes/checks/resource/k8s/DefaultNamespace.py Latest Contributors(2) User Commit Date gruebel chore-fix-flake8-issue... October 11, 2022 YaaraVerner Run-k8s-graph-from-run... December 05, 2021

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