Fixes Joins when we have duplicate names from each source

[samster25]

• Closes: Fix self-joins wrongly omitting columns #442
• Fixes 2 bugs:

• When we join and left and right have different names but the same value
• in vPartition Join: when we are joining, we can clobber names from the left side with the right blocks.

[codecov]

Codecov Report

Merging #592 (335bf5b) into main (5181138) will increase coverage by 0.27%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #592      +/-   ##
==========================================
+ Coverage   78.50%   78.78%   +0.27%     
==========================================
  Files         102      102              
  Lines        8599     8611      +12     
==========================================
+ Hits         6751     6784      +33     
+ Misses       1848     1827      -21     

Impacted Files	Coverage Δ
daft/logical/logical_plan.py	78.17% <100.00%> (ø)
daft/runners/partitioning.py	94.37% <100.00%> (+0.15%)	⬆️
daft/expressions.py	90.67% <0.00%> (-1.20%)	⬇️
daft/runners/blocks.py	85.42% <0.00%> (+0.29%)	⬆️
daft/runners/ray_runner.py	58.22% <0.00%> (+11.11%)	⬆️