bazel_4: wraps bazel to add default runtime dependencies to PATH

Bazel requires basic runtime dependencies in the PATH for repository rules and genrules. When `which` is missing in particular, it can lead to misleading error messages.

pkgs/development/tools/build-managers/bazel/bazel_4/default.nix

@@ -591,6 +591,7 @@ stdenv.mkDerivation rec {
     # The binary _must_ exist with this naming if your project contains a .bazelversion
     # file.
     cp ./bazel_src/scripts/packages/bazel.sh $out/bin/bazel
+    wrapProgram $out/bin/bazel $wrapperfile --suffix PATH : ${defaultShellPath}
     mv ./bazel_src/output/bazel $out/bin/bazel-${version}-${system}-${arch}
 
     mkdir $out/share