feat(general): Add env var for policy metadata

[tsmithv11]

User description

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

Adds environment variables

Checklist:

• 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

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Generated description

Below is a concise technical summary of the changes proposed in this PR:

Adds environment variables for policy metadata filtering and updates CLI documentation to reflect these changes.

Topic	Details
CLI Doc Update	Updates the CLI Command Reference documentation to include new environment variables for policy metadata filtering. Modified files (1) docs/2.Basics/CLI Command Reference.md Latest Contributors(2) User Commit Date tsmithv11 feat-general-Change-be... January 06, 2025 EmmaVinen feat-general-allow-too... September 11, 2024
Policy Metadata Env	Adds environment variables for policy metadata filtering in the ExtArgumentParser class. Modified files (1) checkov/common/util/ext_argument_parser.py Latest Contributors(2) User Commit Date EmmaVinen feat-general-allow-too... September 11, 2024 mikeurbanski1@users.no... platform-general-handl... July 25, 2024

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[kartikp10]

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