Remove hcl2 python dependency (#3836)

* Migrate organization policy tests to standard tftest.yaml.

Remove python-hcl2 dependency and the custom python test file.
Consolidate the boolean, list, and custom constraint tests into a single `org_policies` test with a factory equivalent.
Restructure factory files into a unified `factory/` directory.

* Migrate project and folder org policy tests to standard tftest.yaml.

Replicate the organization module changes for project and folder modules:
- Remove python-hcl2 dependency usages and conftest.py.
- Remove custom python test files for org policies.
- Consolidate org policy tests into a single `org_policies` test with a factory equivalent.
- Unify factory files into a `factory/` directory.
- Remove redundant common.tfvars in folder module.

* Add factory policies directory to duplicate-diff checks.

Ensure the YAML factory files for org policies remain perfectly identical across the organization, folder, and project modules.

* Remove unused deepdiff dependency from requirements and pre-commit config.

* Add boilerplate

* fix broken link

tools/duplicate-diff.py

@@ -21,6 +21,12 @@ import os
 
 # List of folders and files that are expected to have same content
 duplicates = [
+    # factory policies
+    [
+        "tests/modules/folder/factory/policies",
+        "tests/modules/organization/factory/policies",
+        "tests/modules/project/factory/policies",
+    ],
     # schemas
     [
         "fast/stages/1-vpcsc/schemas/access-level.schema.json",