Fix wheel and sdist build configuration

[asnare]

Changes

This PR updates the project configuration so that the source distribution properly contains the files needed to build the wheel.

Linked issues

For more context refer to databrickslabs/lakebridge#2419.

Functionality

• update project packaging

Tests

• manually tested: make build and examined the produced source and wheel distributions

[github-actions]

✅ 2/2 passed, 21s total

_{Running from acceptance #9043}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.79%. Comparing base (4451cbe) to head (4fa1f72).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4828      +/-   ##
==========================================
- Coverage   87.79%   87.79%   -0.01%     
==========================================
  Files         123      123              
  Lines       17595    17595              
  Branches     3717     3717              
==========================================
- Hits        15448    15447       -1     
  Misses       1458     1458              
- Partials      689      690       +1     

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