chore(sca): When trying to load policies, continue if it's custom

[MaryArmaly]

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[//]: # "

PR Title

Be aware that we use the title to create changelog automatically and therefore only allow specific prefixes
- break:    to indicate a breaking change, this supersedes any of the types
- feat:     to indicate new features or checks
- fix:      to indicate a bugfix or handling of edge cases of existing checks
- docs:     to indicate an update to our documentation
- chore:    to indicate adjustments to workflow files or dependency updates
- platform: to indicate a change needed for the platform
Additionally a scope is needs to be added to the prefix, which indicates the targeted framework, in doubt choose 'general'.
#    
Allowed prefixs:
ansible|argo|arm|azure|bicep|bitbucket|circleci|cloudformation|dockerfile|github|gha|gitlab|helm|kubernetes|kustomize|openapi|sast|sca|secrets|serverless|terraform|general|graph|terraform_plan|terraform_json
#
ex.
feat(terraform): add CKV_AWS_123 to ensure that VPC Endpoint Service is configured for Manual Acceptance

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Description

Checkov is currently unable to parse the new custom policies. Implementing this solution will prevent the occurrence of exceptions. Anyway, this change won't affect the results in the tables

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:

• [x] My code follows the style guidelines of this project
• [x] 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
• [x] New and existing tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules