BUG: remove -Dstrip=true default, it doesn't work on macOS

See scipy/scipy#16446 for details
on how it fails on macOS and also for proof that it is not
needed because it does not change the wheel size on Linux.

This was originally discussed in gh-27. It looks like I was
wrong there about the need for stripping. That info was based
on my experience with `numpy.distutils` builds; there it is
needed because of the hardcoded debug flags that cannot be
switched with a flag like `-Ddebug=false` like we use in
`meson-python`.

mesonpy/__init__.py

@@ -487,7 +487,6 @@ def _configure(self, reconfigure: bool = False) -> None:
                 f'--native-file={os.fspath(self._meson_native_file)}',
                 # TODO: Allow configuring these arguments
                 '-Ddebug=false',
-                '-Dstrip=true',
                 '-Doptimization=2',
                 *setup_args,
             )