🐞 Fix installation package issues

[samet-akcay]

📝 Description

• Add missing lightning-utilities to the core dependencies
• Update the coverage ignore configuration
• Remove VlmAd's relative import from models to avoid missing optional dependencies.

✨ Changes

Select what type of change your PR is:

• 🐞 Bug fix (non-breaking change which fixes an issue)
• 🔨 Refactor (non-breaking change which refactors the code base)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔒 Security update

✅ Checklist

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• 📋 I have summarized my changes in the CHANGELOG and followed the guidelines for my type of change (skip for minor changes, documentation updates, and test enhancements).
• 📚 I have made the necessary updates to the documentation (if applicable).
• 🧪 I have written tests that support my changes and prove that my fix is effective or my feature works (if applicable).

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.95%. Comparing base (31952db) to head (a8bf7cd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2395      +/-   ##
==========================================
+ Coverage   81.68%   81.95%   +0.27%     
==========================================
  Files         283      283              
  Lines       12687    12536     -151     
==========================================
- Hits        10363    10274      -89     
+ Misses       2324     2262      -62     

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