enable fmt_module tests by updating module-test.cc (#4702)

- Update g++ module testing to use g++ version 15 instead of 14.
  The module support in version 14 isn't very stable and the module
  testing was not working due to unresolved locale symbols.
- Update CI for linux and macos to add verbosity so its consistent with
  windows.
- Refactor test/CMakeLists.txt to enable testing for modules
- The tests in `module-test.cc` seem to not have been updated in some
  time despite changes in the main library.
- Wide String versions of several tests appear to be deprecated so have
  been removed.
- Refactored tests related to `fmt::format_args` that now requires lvalue
  references as opposed to direct values.
- Remove the none-working code identified in the `module-test.cc` file
  while updating.

.github/workflows/macos.yml

@@ -53,6 +53,6 @@ jobs:
 
     - name: Test
       working-directory: ${{runner.workspace}}/build
-      run: ctest -C ${{matrix.build_type}}
+      run: ctest -C ${{matrix.build_type}} -V
       env:
         CTEST_OUTPUT_ON_FAILURE: True