Vlq rework

[andyfengHKU]

This PR changes variable length join evaluation strategy from DFS to BFS and unify with shortest path join

[codecov]

Codecov Report

Patch coverage: 94.48% and project coverage change: -0.08 ⚠️

Comparison is base (ecb5d46) 92.30% compared to head (2a7b455) 92.22%.

❗ Current head 2a7b455 differs from pull request most recent head 7280162. Consider uploading reports for the commit 7280162 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1505      +/-   ##
==========================================
- Coverage   92.30%   92.22%   -0.08%     
==========================================
  Files         678      676       -2     
  Lines       24350    24306      -44     
==========================================
- Hits        22476    22417      -59     
- Misses       1874     1889      +15     

Impacted Files	Coverage Δ
src/include/planner/join_order_enumerator.h	100.00% <ø> (ø)
src/processor/mapper/map_semi_masker.cpp	92.00% <ø> (ø)
...essor/operator/recursive_extend/recursive_join.cpp	78.00% <78.00%> (ø)
src/processor/mapper/map_extend.cpp	97.56% <92.85%> (+2.38%)	⬆️
.../processor/operator/recursive_extend/bfs_state.cpp	94.73% <94.73%> (ø)
...l_plan/logical_operator/logical_recursive_extend.h	100.00% <100.00%> (ø)
src/include/processor/operator/mask.h	100.00% <100.00%> (ø)
...de/processor/operator/recursive_extend/bfs_state.h	100.00% <100.00%> (ø)
...ocessor/operator/recursive_extend/recursive_join.h	100.00% <100.00%> (ø)
...or/recursive_extend/shortest_path_recursive_join.h	100.00% <100.00%> (ø)
... and 5 more

... and 3 files with indirect coverage changes

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