feat(terraform): Add a terraform block check

[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

Flag the use of S3 as a backend without a lock file, potentially leading to a Supply Chain attack where state files can be modified by a bad actor

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:

This pull request introduces new checks and infrastructure for Terraform block checks, ensuring state files are locked when using S3 as a backend and enhancing the base classes and runners for Terraform checks.

Topic	Details
Terraform State Lock	Implements a new check to ensure Terraform state files are locked when using S3 as a backend Modified files (6) tests/terraform/checks/terraform/terraform/resources/lock/pass_dynamodb_table.tf tests/terraform/checks/terraform/terraform/resources/lock/unknown.tf checkov/terraform/checks/terraform/terraform/StateLock.py tests/terraform/checks/terraform/terraform/test_StateLock.py tests/terraform/checks/terraform/terraform/resources/lock/pass.tf tests/terraform/checks/terraform/terraform/resources/lock/fail1.tf Latest Contributors(0) User Commit Date
Terraform Check Infra	Adds infrastructure to support Terraform block checks, including new base classes and modifications to existing runners Modified files (9) checkov/terraform/checks/terraform/__init__.py checkov/terraform/checks/terraform/terraform/__init__.py checkov/terraform/context_parsers/parsers/terraform_context_parser.py checkov/terraform/checks/terraform/registry.py tests/terraform/checks/terraform/terraform/__init__.py checkov/terraform/checks/terraform/base_registry.py checkov/terraform/checks/terraform/base_check.py checkov/terraform/runner.py checkov/terraform/base_runner.py Latest Contributors(2) User Commit Date SteveVaknin fix-terraform-fix-fail... July 17, 2024 lirshindalman platform-general-remov... January 28, 2024

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[talazuri]

LGTM