chore: move `test_util/std` to `tests/util/std` (#22402)

Note: tests are not the only part of the codebase that uses `std`. Other
parts, like `tools/`, do too. So, it could be argued that this is a
little misleading. Either way, I'm doing this as discussed with
@mmastrac.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/testdata/run/websocket_server_idletimeout.ts b/tests/testdata/run/websocket_server_idletimeout.ts
index f116c4556..85b031b8e 100644
--- a/tests/testdata/run/websocket_server_idletimeout.ts
+++ b/tests/testdata/run/websocket_server_idletimeout.ts
@@ -1,4 +1,4 @@
-import { assertEquals } from "../../../test_util/std/assert/mod.ts";
+import { assertEquals } from "../../../tests/util/std/assert/mod.ts";
 
 const errorDeferred = Promise.withResolvers<void>();
 const closeDeferred = Promise.withResolvers<void>();