pulumi-bin: move to pkgs/by-name

this shouldn't create any rebuilds

pkgs/by-name/pu/pulumi-bin/update.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell update-pulumi-shell.nix -i bash
+#!nix-shell -i bash -p gh
 # shellcheck shell=bash
 # Bash 3 compatible for Darwin
 

pkgs/tools/admin/pulumi-bin/update-pulumi-shell.nix

@@ -1,9 +0,0 @@
-{
-  nixpkgs ? import ../../../.. { },
-}:
-with nixpkgs;
-mkShell {
-  packages = [
-    pkgs.gh
-  ];
-}

pkgs/top-level/all-packages.nix

@@ -3336,8 +3336,6 @@ with pkgs;
 
   pulumiPackages = recurseIntoAttrs pulumi.pkgs;
 
-  pulumi-bin = callPackage ../tools/admin/pulumi-bin { };
-
   patch = gnupatch;
 
   pcscliteWithPolkit = pcsclite.override {