fix: Fix lazy frame join expression

[stijnherfst]

Fixes #19822

Previously only the first column was added to the local projections while all of the columns in the sub expression should be added.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.48%. Comparing base (6c34d59) to head (ab2d8e6).
Report is 38 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19974      +/-   ##
==========================================
+ Coverage   79.40%   79.48%   +0.07%     
==========================================
  Files        1550     1556       +6     
  Lines      214909   216394    +1485     
  Branches     2447     2456       +9     
==========================================
+ Hits       170653   172003    +1350     
- Misses      43699    43833     +134     
- Partials      557      558       +1     

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

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests