fix: use local dataset for CLV tests

[nayan2167]

Description

• Modified test_utils.py to use the local CLV dataset instead of downloading from GitHub.
• Ensured the dataset is included in the repository.

Related Issue

• Closes CLV dataset doesn't have to download from GitHub #1411
• Related to #

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Modules affected

• MMM
• CLV
• Customer Choice

Type of change

• New feature/enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pymc-marketing--1412.org.readthedocs.build/en/1412/

[wd60622]

Thanks for the PR! CI / CD is running then should be good to merge!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.65%. Comparing base (8a0b076) to head (3902c1a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1412   +/-   ##
=======================================
  Coverage   94.65%   94.65%           
=======================================
  Files          48       48           
  Lines        5257     5257           
=======================================
  Hits         4976     4976           
  Misses        281      281           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[wd60622]

Thanks for the contribution @nayan2167 !

Hope to see you contribute again!