[multistage][bugfix] fix multi-semi-join issues

[walterddr]

this fixes #12014..

side effects (good ones)

• alter the order of AGG_PROJECT merge mechanism, now projects are much more concise
• avoided exchange more than required data off leaf.
• fix another bug when dynamic broadcast was applying to lateral semi-join --> it is not allowed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (32db500) 61.62% compared to head (288e386) 61.61%.
Report is 8 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #12038      +/-   ##
============================================
- Coverage     61.62%   61.61%   -0.01%     
+ Complexity     1151     1147       -4     
============================================
  Files          2385     2385              
  Lines        129423   129519      +96     
  Branches      20036    20043       +7     
============================================
+ Hits          79751    79802      +51     
- Misses        43855    43907      +52     
+ Partials       5817     5810       -7     

Flag	Coverage Δ
custom-integration1	<0.01% <ø> (ø)
integration	<0.01% <ø> (ø)
integration1	<0.01% <ø> (ø)
integration2	0.00% <ø> (ø)
java-11	61.57% <ø> (-0.01%)	⬇️
java-21	61.49% <ø> (-0.01%)	⬇️
skip-bytebuffers-false	61.60% <ø> (+<0.01%)	⬆️
skip-bytebuffers-true	61.45% <ø> (-0.03%)	⬇️
temurin	61.61% <ø> (-0.01%)	⬇️
unittests	61.60% <ø> (-0.01%)	⬇️
unittests1	46.96% <ø> (+<0.01%)	⬆️
unittests2	27.55% <ø> (-0.01%)	⬇️

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