gleam: move js runtimes and git to nativeCheckInputs

JS runtimes are only used during checks for the runtime
integration tests.
Added comment for inclusion of git.

pkgs/by-name/gl/gleam/package.nix

@@ -27,16 +27,22 @@ rustPlatform.buildRustPackage (finalAttrs: {
   cargoHash = "sha256-TJqylGjXdkunE5mHkpFnvv3SENBFwtQehV0q2k3hNMY=";
 
   nativeBuildInputs = [
-    git
     pkg-config
     erlang_27
+  ];
+
+  buildInputs = [ openssl ];
+
+  nativeCheckInputs = [
+    # used by several tests
+    git
+
+    # js runtimes used for integration tests
     nodejs
     bun
     deno
   ];
 
-  buildInputs = [ openssl ];
-
   checkFlags = [
     # Makes a network request
     "--skip=tests::echo::echo_dict"