[API] Deprecate second OnCriticalMemoryPressure

Move forward with the deprecation.

R=mlippautz@chromium.org

Bug: chromium:634547
Change-Id: I46227ee119923d7f6ac364769718e5bca90686e7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3780531
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82627}

include/v8-platform.h

@@ -952,7 +952,7 @@ class Platform {
    *
    * Embedder overrides of this function must NOT call back into V8.
    */
-  V8_DEPRECATE_SOON("Use the method without informative parameter")
+  V8_DEPRECATED("Use the method without informative parameter")
   virtual bool OnCriticalMemoryPressure(size_t length) { return false; }
 
   /**