[Test] added test to check regex validation of spacy model name

[Cedric-Magnan]

Description

I've removed a test on tokenizer.py when changing to Poetry by automatically loading spacy models when they are not available in the environment.
I now add a test on tokenizer.py to check if model names are well validated and that hackers can't execute malicious code with NLPretext !

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've read the CODE_OF_CONDUCT.md document.
• I've read the CONTRIBUTING.md guide.
• I've updated the code style using make codestyle.
• I've written tests for all new methods and classes that I created.
• I've written the docstring in Google format for all the methods and classes that I used.