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, 1 insertions, 1 deletions

diff --git a/tests/unit_node/_fs/_fs_stat_test.ts b/tests/unit_node/_fs/_fs_stat_test.ts
index 38d5ca985..bdca51502 100644
--- a/tests/unit_node/_fs/_fs_stat_test.ts
+++ b/tests/unit_node/_fs/_fs_stat_test.ts
@@ -1,7 +1,7 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 import { assertCallbackErrorUncaught } from "../_test_utils.ts";
 import { BigIntStats, stat, Stats, statSync } from "node:fs";
-import { assertEquals, fail } from "@test_util/std/assert/mod.ts";
+import { assertEquals, fail } from "@std/assert/mod.ts";
 
 export function assertStats(actual: Stats, expected: Deno.FileInfo) {
   assertEquals(actual.dev, expected.dev);