REFACTOR: conftest edb examples

[hui-zhou-a]

Refactor edb_examples class in conftest to manage temp folder better

• edb_examples class is initialized in init method which runs before every test
• temp folder is named as the test name

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.81%. Comparing base (3eb865f) to head (d8e20b5).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1820      +/-   ##
==========================================
- Coverage   71.47%   70.81%   -0.67%     
==========================================
  Files         254      254              
  Lines       43007    43008       +1     
==========================================
- Hits        30740    30456     -284     
- Misses      12267    12552     +285     

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[svandenb-dev]

LGTM