catchorg/Catch2 v3.8.0 on GitHub

Added std::initializer_list overloads for (Unordered)RangeEquals matcher (#2915, #2919)
Added explicit casts to silence GCC's Wconversion (#2875)
Made the use of builtin_constant_p tricks in assertion macros configurable (#2925)
- It is used to prod GCC-like compilers into providing warnings for the asserted expressions, but the compilers miscompile it annoyingly often.
Cleaned out Clang-Tidy's performance-enum-size warnings
Added support for using from_range generator with iterators with value_type = const T (#2926)
- This is not correct value_type typedef, but it is used in the wild and the change does not make the code meaningfully worse.

Fixes and improvements for catch_discover_tests CMake helper
- Removed redundant CTEST_FILE param when creating the indirection file for PRE_TEST discovery mode (#2936)
- Rewrote the test discovery logic to use output from the JSON reporter
  - This means that catch_discover_tests now requires CMake 3.19 or newer
- Added ADD_TAGS_AS_LABELS option. If specified, each CTest test will be labeled with corrensponding Catch2's test tag
Bumped up the minimum required CMake version to build Catch2 to 3.16
Meson build now provides option to avoid installing Catch2
Bazel build is moved to Bzlmod.