[wasm][debug] Skip another test in isolates variant

Debugging with multiple isolates involved is known to be broken. Thus
skip another test which flakes currently.

TBR=thibaudm@chromium.org

Bug: v8:10359
Change-Id: Ib0758794623cca1cf9bdd6d6d8aa673ceffd9d7c
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2140933Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67052}

test/debugger/debugger.status

@@ -161,6 +161,7 @@
   # start flaking)
   'debug/wasm/debug-enabled-tier-down-wasm': [SKIP],
   'debug/wasm/debug-enabled-tier-down-wasm-unsupported-liftoff': [SKIP],
+  'debug/wasm/debug-step-into-wasm': [SKIP],
   'regress/regress-crbug-1032042': [SKIP],
 }],  # 'isolates'