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, 2 deletions

diff --git a/tests/unit_node/util_test.ts b/tests/unit_node/util_test.ts
index 8480266c1..e01226e3a 100644
--- a/tests/unit_node/util_test.ts
+++ b/tests/unit_node/util_test.ts
@@ -5,8 +5,8 @@ import {
   assertEquals,
   assertStrictEquals,
   assertThrows,
-} from "@test_util/std/assert/mod.ts";
-import { stripColor } from "@test_util/std/fmt/colors.ts";
+} from "@std/assert/mod.ts";
+import { stripColor } from "@std/fmt/colors.ts";
 import * as util from "node:util";
 import { Buffer } from "node:buffer";