Remove non-standard test_filter_<model_name>, test_forms_<model_name> and test_models_<model_name>

[smk4664]

Environment

• cookiecutter-nautobot-app version: nautobot-app-2.3.2

Proposed Functionality

Remove the non-standard test_filter_{{ cookiecutter.model_class_name | lower }}.py, test_forms_{{ cookiecutter.model_class_name | lower }}.py and test_models_{{ cookiecutter.model_class_name | lower }}.py.

Replace these with the appropriate test_filters.py, test_forms.py and test_models.py

Use Case

Baked cookies follow our standards.

[bryanculver]

We should be on the lookout as to how Drift Manager handles this.