bind: doCheck = false;

The flakiness of netmgr_test and doh_test on Hydra is very annoying.
It's a long-term problem, and sometimes really bad:
https://hydra.nixos.org/build/254045328#tabs-buildsteps

Feel free to do partial test instead of full disabling,
or anything that's relatively reliable.

pkgs/servers/dns/bind/default.nix

@@ -77,11 +77,15 @@ stdenv.mkDerivation rec {
   '';
 
   enableParallelBuilding = true;
-  # TODO: investigate the aarch64-linux failures; see this and linked discussions:
+
+  doCheck = false;
+  # TODO: investigate failures; see this and linked discussions:
   # https://github.com/NixOS/nixpkgs/pull/192962
+  /*
   doCheck = with stdenv.hostPlatform; !isStatic && !(isAarch64 && isLinux)
     # https://gitlab.isc.org/isc-projects/bind9/-/issues/4269
     && !is32bit;
+  */
   checkTarget = "unit";
   checkInputs = [
     cmocka