Allow py_osx_ver to vary in length

osx_utils.sh

@@ -511,7 +511,7 @@ function fuse_macos_intel_arm64 {
     mkdir -p tmp_fused_wheelhouse
     for whl in $wheelhouse/*.whl; do
        if [[ "$whl" == *macosx_${py_osx_ver}_x86_64.whl ]]; then
-           whl_base=$(echo $whl | rev | cut -c 23- | rev)
+           whl_base=$(sed "s/macosx_${py_osx_ver}_x86_64.whl//" <<< $whl)
            if [[ -f "${whl_base}macosx_11_0_arm64.whl" ]]; then
                delocate-fuse $whl "${whl_base}macosx_11_0_arm64.whl" -w tmp_fused_wheelhouse
                mv tmp_fused_wheelhouse/$(basename $whl) $wheelhouse/$(basename ${whl_base})macosx_${py_osx_ver}_universal2.whl