Enable the MirrorBypass logic in Swift 6

[gwynne]

These changes are now available in 1.50.3

It turns out that the "bypass" for Mirror works fine in Swift 6, so let's use it.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 24.22%. Comparing base (dd5a92d) to head (4e7b44b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/FluentKit/Model/MirrorBypass.swift	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #631      +/-   ##
==========================================
- Coverage   24.28%   24.22%   -0.06%     
==========================================
  Files         149      149              
  Lines        9350     9348       -2     
==========================================
- Hits         2271     2265       -6     
- Misses       7079     7083       +4     

Files with missing lines	Coverage Δ
Sources/FluentKit/Model/MirrorBypass.swift	76.19% <75.00%> (-6.89%)	⬇️