When compiled with `target_cpu = "x86"` several
VirtualAddressSpaceTest's crashed with segmentation fault when calling
VirtualAlloc2. Explicitly specifying calling convention fixed the issue.

Change-Id: Ie505006be0d44525c935c89b84caa2c373cea566
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3501836Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Auto-Submit: Dmitrii Tsykunov <dtsykunov1@yandex-team.ru>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79436}