chore: use `@std` import instead of `@test_util/std` (#22398)

This PR:
1. Replaces `@test_util/std`-prefixed imports with `@std`.
2. Adds `@std/` import map entries to a few `deno.json` files.

1 files changed, 2 insertions, 6 deletions

diff --git a/tests/unit_node/worker_threads_test.ts b/tests/unit_node/worker_threads_test.ts
index e79049229..5d3023069 100644
--- a/tests/unit_node/worker_threads_test.ts
+++ b/tests/unit_node/worker_threads_test.ts
@@ -1,11 +1,7 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-import {
-  assert,
-  assertEquals,
-  assertObjectMatch,
-} from "@test_util/std/assert/mod.ts";
-import { fromFileUrl, relative } from "@test_util/std/path/mod.ts";
+import { assert, assertEquals, assertObjectMatch } from "@std/assert/mod.ts";
+import { fromFileUrl, relative } from "@std/path/mod.ts";
 import * as workerThreads from "node:worker_threads";
 import { EventEmitter, once } from "node:events";