Fix passing failFast flags to implicit partial transformers

[krzemin]

Added test that proved incorrect calling of implicitly found partial transformers.
They were accidentally always passed failFast flag set to false, regardless of the flag value passed by the caller.

This PR fixes the issue and makes sure we always propagate correct failFast flag value.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (4f85ada) 98.35% compared to head (9540573) 98.36%.

❗ Current head 9540573 differs from pull request most recent head 2626826. Consider uploading reports for the commit 2626826 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #319   +/-   ##
=======================================
  Coverage   98.35%   98.36%           
=======================================
  Files          41       41           
  Lines        1156     1161    +5     
  Branches      144      144           
=======================================
+ Hits         1137     1142    +5     
  Misses         19       19           

Impacted Files	Coverage Δ
...a/io/scalaland/chimney/internal/macros/Model.scala	100.00% <100.00%> (ø)
...nd/chimney/internal/macros/TransformerMacros.scala	98.28% <100.00%> (ø)

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