chore(tvix): patch crate2nix to drop darwin dontStrip

This patch has already been applied on upstream but there hasn't been an
official release yet so we patch it ourselves.

Upstreamed patch: 0209f258cd

Follow-up of: https://cl.tvl.fyi/c/depot/+/11856

Change-Id: If56071ce5753fd26e2b4c203cd831bbe5d329009
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11858
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

tvix/Cargo.nix

@@ -18000,8 +18000,6 @@ rec {
             buildRustCrateForPkgsFunc pkgs
               (
                 crateConfig // {
-                  # https://github.com/NixOS/nixpkgs/issues/218712
-                  dontStrip = stdenv.hostPlatform.isDarwin;
                   src = crateConfig.src or (
                     pkgs.fetchurl rec {
                       name = "${crateConfig.crateName}-${crateConfig.version}.tar.gz";