treewide: don't use python3Minimal where it is not required

Building a python environment with python3Minimal requires hydra
to bootstrap pip and build all packages used in the environment
which would otherwise not be built. This reduces cache re-use and duplicates things.

Also common dependencies normally included in python itself
are not properly checked and can cause hard to debug errors
because everyone just assumes those modules are there.

nixos/lib/make-options-doc/default.nix

@@ -120,7 +120,7 @@ in rec {
     { meta.description = "List of NixOS options in JSON format";
       nativeBuildInputs = [
         pkgs.brotli
-        pkgs.python3Minimal
+        pkgs.python3
       ];
       options = builtins.toFile "options.json"
         (builtins.unsafeDiscardStringContext (builtins.toJSON optionsNix));

nixos/tests/installer.nix

@@ -510,14 +510,8 @@ let
             ntp
             perlPackages.ListCompare
             perlPackages.XMLLibXML
-            python3Minimal
             # make-options-doc/default.nix
-            (let
-                self = (pkgs.python3Minimal.override {
-                  inherit self;
-                  includeSiteCustomize = true;
-                });
-              in self.withPackages (p: [ p.mistune ]))
+            python3.withPackages (p: [ p.mistune ])
             shared-mime-info
             sudo
             texinfo

nixos/tests/os-prober.nix

@@ -95,7 +95,7 @@ in {
           ntp
           perlPackages.ListCompare
           perlPackages.XMLLibXML
-          python3Minimal
+          python3
           shared-mime-info
           stdenv
           sudo

pkgs/tools/nix/nixos-render-docs/default.nix

@@ -1,18 +1,11 @@
 { lib
 , stdenv
 , python3
-, python3Minimal
 , runCommand
 }:
 
 let
-  # python3Minimal can't be overridden with packages on Darwin, due to a missing framework.
-  # Instead of modifying stdenv, we take the easy way out, since most people on Darwin will
-  # just be hacking on the Nixpkgs manual (which also uses make-options-doc).
-  python = ((if stdenv.isDarwin then python3 else python3Minimal).override {
-    self = python;
-    includeSiteCustomize = true;
-  }).override {
+  python = python3.override {
     packageOverrides = final: prev: {
       markdown-it-py = prev.markdown-it-py.overridePythonAttrs (_: {
         doCheck = false;