fix Unwind op construction

[raz-mon]

Fixes the construction of the Unwind operation, by building the ops corresponding to the path comprehension that may be inside it.

Fixes #3032.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 🎉

Comparison is base (177cb1c) 90.84% compared to head (34b0caf) 90.86%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3112      +/-   ##
==========================================
+ Coverage   90.84%   90.86%   +0.02%     
==========================================
  Files         294      294              
  Lines       30257    30263       +6     
==========================================
+ Hits        27486    27498      +12     
+ Misses       2771     2765       -6     

Impacted Files	Coverage Δ
...rc/ast/enrichment/annotate_projected_named_paths.c	100.00% <100.00%> (ø)
...ution_plan_build/build_pattern_comprehension_ops.c	99.03% <100.00%> (ø)
...an/execution_plan_build/execution_plan_construct.c	95.03% <100.00%> (+0.09%)	⬆️

... and 4 files with indirect coverage changes

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