The natives blob is deprecated and will be removed in the next
release.

This commit does two things, 1. it disables the v8_extra_library_files
gn argument which will make building natives_blob.bin through gn
impossible; 2. it marks API functions associated with the natives blob
as V8_DEPRECATE_SOON.

Embedders should remove any uses of SetNativesDataBlob and replace all
calls to

 InitializeExternalStartupData(const char*, const char*)

with the new function

 InitializeExternalStartupDataFromFile(const char*)

Step 2 is to mark API functions as V8_DEPRECATED.
Step 3, in the next V8 release, is to remove these functions and all
other natives support in V8.

Bug: v8:7624
Change-Id: I745e96c60204a9b94d9240be65dd59bb9bdd0699
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1824944
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64080}