Fix npm bzlmod (#8506)

* Restrict visibility of exported file

* Align npm_translate_lock attrs

* Remove defs_bzl_filename attr

* Align root_package with pnpm-lock.yaml location

Use a symlink to avoid copying the file.

MODULE.bazel

@@ -57,7 +57,10 @@ npm = use_extension("@aspect_rules_js//npm:extensions.bzl", "npm")
 npm.npm_translate_lock(
     name = "flatbuffers_npm",
     npmrc = "//:.npmrc",
-    pnpm_lock = "//:pnpm-lock.yaml",
+    pnpm_lock = "//ts:pnpm-lock.yaml",
+    # Override the Bazel package where pnpm-lock.yaml is located and link
+    # to the specified package instead.
+    root_package = "ts",
     verify_node_modules_ignored = "//:.bazelignore",
 )
 use_repo(npm, "flatbuffers_npm")