[FEAT] [New Query Planner] All functional tests pass + add to CI.

[clarkzinzow]

This PR ensures that all functional tests pass for the new query planner and adds the new query planner to the CI job matrix; all tests are covered and pass except for the Python query planner optimization tests.

The use_new_planner test fixture is removed, since DAFT_NEW_QUERY_PLANNER=1 make test will now work with expected test coverage.

[codecov]

Codecov Report

Merging #1274 (f023cec) into main (57853db) will decrease coverage by 0.21%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1274      +/-   ##
==========================================
- Coverage   87.71%   87.50%   -0.21%     
==========================================
  Files          61       61              
  Lines        6023     6026       +3     
==========================================
- Hits         5283     5273      -10     
- Misses        740      753      +13     

Files Changed	Coverage Δ
daft/context.py	69.89% <100.00%> (-9.68%)	⬇️
daft/logical/rust_logical_plan.py	90.00% <100.00%> (+2.10%)	⬆️

... and 2 files with indirect coverage changes