[heap-profiler] Mark SetBuildEmbedderGraphCallback with `V8_DEPRECATED`

This is not used in Chrome or Node anymore.
(This could also potentially be just removed at this point.)

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I59ecc216faeb3d56d3a52c548a863544570b6173
Reviewed-on: https://chromium-review.googlesource.com/1161936
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54913}

include/v8-profiler.h

@@ -915,7 +915,7 @@ class V8_EXPORT HeapProfiler {
       "Use AddBuildEmbedderGraphCallback to provide info about embedder nodes",
       void SetGetRetainerInfosCallback(GetRetainerInfosCallback callback));
 
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "Use AddBuildEmbedderGraphCallback to provide info about embedder nodes",
       void SetBuildEmbedderGraphCallback(
           LegacyBuildEmbedderGraphCallback callback));