Add security policy definition resource and data source

[seconroy]

Description

Add security policy definition resource and data source,

1. RESOLVED - Failing to create policy however the create object works when pasted into Postman.

2. DO NOT MERGE - Creates policy however tests fail when requesting the new policy, it seems that the /template/policy/security/ endpoint does not return a definitionId for the created policy.

Types of Changes

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to change)
• Build/CI change
• Code quality improvement/refactoring/documentation (no functional changes)

Checklist

• My code follows the code style of this project
• I have added tests to cover my changes
• All new and existing tests pass locally