Add include to make catch_matchers_impl.hpp self-sufficient

[jtunhag]

Description

Add include of catch_test_macro_impl.hpp to catch_matchers_impl.hpp to make it self-sufficient by providing the missing INTERNAL_CATCH_TRY.

This was motivated after I included only catch2/matchers/catch_matchers_floating_point.hpp to further develop my own floating-point matchers, which then couldn't see the definition for INTERNAL_CATCH_TRY.

GitHub Issues

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.17%. Comparing base (222e233) to head (307a3ab).

Additional details and impacted files

@@           Coverage Diff           @@
##            devel    #3210   +/-   ##
=======================================
  Coverage   91.17%   91.17%           
=======================================
  Files         206      206           
  Lines        9080     9080           
=======================================
  Hits         8278     8278           
  Misses        802      802           

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