fix: bun_install adds node_modules to each directory

tests/install_test/BUILD.bazel

@@ -77,6 +77,13 @@ sh_test(
     data = ["//internal:bun_install.bzl"],
 )
 
+sh_test(
+    name = "bun_install_environment_shape_test",
+    srcs = ["environment_shape.sh"],
+    args = ["$(location //internal:bun_install.bzl)"],
+    data = ["//internal:bun_install.bzl"],
+)
+
 sh_test(
     name = "bun_install_workspaces_test",
     srcs = ["workspaces.sh"],