Add field trial test configs for TraceSiteInstanceGetProcessCreation

The CL forces the browser to crash if `SiteInstance::GetProcess` is
called on a SiteInstance without a bound process on developer builds
including the CQ and the CI.

Bug: 388998723, 41452811, 391970626
Change-Id: I5bcd8a2cb6e3ccbd3976f432a086fbf2b3da03e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6207448
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Commit-Queue: Jiacheng Guo <gjc@google.com>
Cr-Commit-Position: refs/heads/main@{#1413867}