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, 3 insertions, 3 deletions

diff --git a/tests/unit/tls_test.ts b/tests/unit/tls_test.ts
index 2bd7768bb..0ad69d3e4 100644
--- a/tests/unit/tls_test.ts
+++ b/tests/unit/tls_test.ts
@@ -7,9 +7,9 @@ import {
   assertStrictEquals,
   assertThrows,
 } from "./test_util.ts";
-import { BufReader, BufWriter } from "@test_util/std/io/mod.ts";
-import { readAll } from "@test_util/std/streams/read_all.ts";
-import { writeAll } from "@test_util/std/streams/write_all.ts";
+import { BufReader, BufWriter } from "@std/io/mod.ts";
+import { readAll } from "@std/streams/read_all.ts";
+import { writeAll } from "@std/streams/write_all.ts";
 import { TextProtoReader } from "../testdata/run/textproto.ts";
 
 const encoder = new TextEncoder();