New API: delete_modeling_region()

[ansnfernand]

Checklist:

• [x] Run unit tests and make sure they all pass
• [x] Check and fix style errors
  • pre-commit command line check
  • Problems tab in PyCharm
• [x] Bench test new/modified APIs by using and modifying the code in the example for the API method
• [] Add new classes to rst files, located at: \doc\source\api
• [x] Generate documentation
• [x] Verify the HTML. It gets generated at: \doc\build\html.
  • Open index.html
  • Click on "API Reference" at the top.
  • Verify HTML for API changes.
• [x] Check that test code coverage is at least 80% when Sherlock is running and can be connected to using gRPC

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 72.72727% with 9 lines in your changes missing coverage. Please review.

Project coverage is 57.72%. Comparing base (b4ed83e) to head (4c50790). Report is 25 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ansys/sherlock/core/layer.py	67.85%	9 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #340 +/- ## ========================================== + Coverage 57.61% 57.72% +0.11% ========================================== Files 21 21 Lines 4327 4360 +33 ========================================== + Hits 2493 2517 +24 - Misses 1834 1843 +9 ```

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