refactor: don't expose Deno[Deno.internal].core namespace (#18816)

test_napi/cleanup_hook_test.js

@@ -12,6 +12,7 @@ if (import.meta.main) {
     const { stdout, stderr, code } = await new Deno.Command(Deno.execPath(), {
       args: [
         "run",
+        "--enable-testing-features-do-not-use",
         "--allow-read",
         "--allow-run",
         "--allow-ffi",

test_napi/tests/napi_tests.rs

@@ -31,6 +31,7 @@ fn napi_tests() {
     .arg("--allow-env")
     .arg("--allow-ffi")
     .arg("--allow-run")
+    .arg("--enable-testing-features-do-not-use")
     .spawn()
     .unwrap()
     .wait_with_output()