apfs-fuse: Let mount find apfs-fuse (#84997)

We add a symlink `mount.fuse.apfs-fuse ~~> apfs-fuse`, so that we can specify
`fuse.apfs-fuse` as `fsType` in `nixos` and have the device mounted. The
current alternative is to specify: `fuse./run/current-system/sw/bin/apfs-fuse`
as `fsType`.

On other distros, using `fuse.apfs-fuse` should work since `mount.fuse`
will just runs `apfs-fuse`, but on nixos the `PATH` of `mount.fuse` is
restricted. The symlink makes it work directly, without having
`mount.fuse` doing the dispatch.

pkgs/tools/filesystems/apfs-fuse/default.nix

@@ -15,6 +15,10 @@ stdenv.mkDerivation {
   buildInputs = [ fuse3 bzip2 zlib attr ];
   nativeBuildInputs = [ cmake ];
 
+  postFixup = ''
+    ln -s $out/bin/apfs-fuse $out/bin/mount.fuse.apfs-fuse
+  '';
+
   meta = with stdenv.lib; {
     homepage    = "https://github.com/sgan81/apfs-fuse";
     description = "FUSE driver for APFS (Apple File System)";