Move CodeQL tooling and shell derivative into tooling directory

Author: rvermeulen

tooling/all-tools.nix

@@ -0,0 +1 @@
+import codeql/default.nix

scripts/codeql/codeql-cli/2.16.0.nix renamed to tooling/codeql/codeql-cli/2.16.0.nix

@@ -1,6 +1,6 @@
 let
   nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/archive/0e148322b344eab7c8d52f6e59b0d95ba73fb62e.tar.gz";
-  pkgs = (import nixpkgs { config = {}; overlays = []; }) // (import ./scripts/codeql/default.nix);
+  pkgs = (import nixpkgs { config = {}; overlays = []; }) // (import ./all-tools.nix);
 in
 
 pkgs.mkShell {