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, 19s total

_{Running from acceptance #9011}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.77%. Comparing base (3414a2f) to head (39dc0c5).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4828   +/-   ##
=======================================
  Coverage   87.77%   87.77%           
=======================================
  Files         123      123           
  Lines       17569    17569           
  Branches     3713     3713           
=======================================
  Hits        15422    15422           
  Misses       1458     1458           
  Partials      689      689           

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