perf: Fix join cost estimates

[desmondcheongzx]

This PR fixes join cost estimates in the following ways:

• Uses number of rows instead of size in bytes for making probe side decisions
• Decreases the aggressiveness of cardinality reductions when there is an is not NULL filter
• Decreases the aggressiveness of inequality filters, especially since these often appear as pairs of a "between" clause
• Increases the aggressiveness of exact equality filters.
• For join edges where there are more than one join condition, adjust cost estimations so that we compute the total domain as |(key1, key2, ...)| ~= min(|left side|, |right side|).
  With multiple join conditions, we know that the join is not a pk-fk join on each join key. Rather, it's a pk-fk join on the tuple of join keys, which we estimate as the cardinality of the smaller table of the join.

[codspeed-hq]

CodSpeed Performance Report

Merging #3831 will degrade performances by 27.56%

_{Comparing desmond/coup-de-grace-join-order (b246bd5) with main (b830647)}

Summary

⚡ 1 improvements
❌ 3 regressions
✅ 20 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	test_tpch[1-in-memory-native-10]	213 ms	284.2 ms	-25.08%
❌	test_tpch[1-in-memory-native-5]	321.6 ms	382.7 ms	-15.97%
❌	test_tpch_sql[1-in-memory-native-10]	212.3 ms	293.1 ms	-27.56%
⚡	test_tpch_sql[1-in-memory-native-8]	148.3 ms	130.1 ms	+13.99%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.64%. Comparing base (a42e55a) to head (b246bd5).
Report is 32 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3831      +/-   ##
==========================================
- Coverage   77.96%   77.64%   -0.32%     
==========================================
  Files         752      762      +10     
  Lines       95181    98720    +3539     
==========================================
+ Hits        74208    76652    +2444     
- Misses      20973    22068    +1095     

Files with missing lines	Coverage Δ
src/daft-dsl/src/expr/mod.rs	74.90% <ø> (-1.61%)	⬇️
src/daft-local-execution/src/pipeline.rs	89.23% <100.00%> (ø)
...tion/rules/reorder_joins/brute_force_join_order.rs	99.81% <100.00%> (+0.03%)	⬆️
...src/optimization/rules/reorder_joins/join_graph.rs	91.14% <100.00%> (+0.19%)	⬆️

... and 147 files with indirect coverage changes