[Fix] Flattening finalize.

[d0cd]

This PR fixes flattening in finalize blocks.

[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 77.25%. Comparing base (ccea68a) to head (656f096).

Files	Patch %	Lines
compiler/passes/src/flattening/flatten_program.rs	81.81%	2 Missing ⚠️
...ompiler/passes/src/flattening/flatten_statement.rs	86.66%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           testnet3   #27953      +/-   ##
============================================
+ Coverage     77.22%   77.25%   +0.02%     
============================================
  Files           205      205              
  Lines          7026     7057      +31     
  Branches       7026     7057      +31     
============================================
+ Hits           5426     5452      +26     
- Misses         1600     1605       +5     

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