This is to establish a naming rule for Torque-generated files:
- If the file is called foo/bar-tq..., then it is derived from a
  file foo/bar.tq
- Otherwise it doesn't belong to a specific .tq file.

So far, we attached -tq to all Torque-generated file names, where it
sometimes corresponded to a .tq file name and sometimes not.
It is not necessary to add -tq to file names to indicate that they are
Torque-generated, since they are already in a directory called
torque-generated, and we always refer to them as
"torque-generated/filename", so there is no confusion even though some
files now have the same name as a corresponding hand-written file, for
example factory.cc.

TBR: hpayer@chromium.org
Bug: v8:7793
Change-Id: Ie172babad1fc7422fd1059c48f5dafaa53e50c8b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2414218
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70060}