Add gitMinimal to all shell environments

Cabal needs git on PATH for source-repository-package stanzas in
cabal.project files. Without it, builds fail with Cabal-6666.

This was observed in IntersectMBO/cardano-db-sync#2085 where 6 out of 9
failing CI jobs reported "The program 'git' is required but it could not
be found."

Add gitMinimal (146 MiB closure) instead of git (1.5 GiB) to all four
shell definitions — the same package nixpkgs uses for fetchgit. The 10x
smaller closure matters for container images built from devx shells.

- dynamic.nix: add gitMinimal to buildInputs, drop redundant git from
  withGHCTooling (gitMinimal now covers it)
- static.nix: add gitMinimal to nativeBuildInputs
- cross-js.nix: add gitMinimal to nativeBuildInputs
- cross-windows.nix: add pkgsBuildBuild.gitMinimal to nativeBuildInputs

Author: angerman

cross-js.nix

@@ -104,6 +104,7 @@ pkgs.mkShell ({
         perl
         stdenv.cc.cc.lib
         which
+        gitMinimal
     ]) ++ (with pkgs.buildPackages; [
     ])
     ++ builtins.attrValues haskell-tools

cross-windows.nix

@@ -211,6 +211,7 @@ pkgs.pkgsBuildBuild.mkShell ({
         pkgsBuildBuild.perl
         stdenv.cc.cc.lib
         pkgsBuildBuild.which
+        pkgsBuildBuild.gitMinimal
     ])
     ++ map pkgs.lib.getDev (with pkgs; [
         zlib pcre openssl

dynamic.nix

@@ -125,6 +125,7 @@ pkgs.mkShell {
         pcre
         pkg-config
         which
+        gitMinimal
         zlib
       ])
       ++ optional stdenv.hostPlatform.isLinux pkgs.systemd
@@ -135,7 +136,7 @@ pkgs.mkShell {
       )
       ++ attrValues haskell-tools
       ++ optionals withGHCTooling (
-        with pkgs; [ python3 automake autoconf alex happy git libffi.dev ]
+        with pkgs; [ python3 automake autoconf alex happy libffi.dev ]
       )
     ;
 

static.nix

@@ -161,6 +161,7 @@ pkgs.mkShell (rec {
         perl
         stdenv.cc.cc.lib
         which
+        gitMinimal
     ]) ++ (with pkgs.buildPackages; [
     ])
     ++ builtins.attrValues haskell-tools