Most Torque-defined extern classes already use @generateCppClass. As
Nico pointed out in [1], it would be nice to convert the remaining
classes and remove this option. This change converts about a third of
those remaining classes. I know that the future of Torque-defined
classes is a subject of some debate right now, but I think that it's
worth doing a few mechanical changes to reduce the existing variety of
options.

[1] https://docs.google.com/document/d/1q_gZLnXd4bGnCx3IUfbln46K3bSs9UHBGasy9McQtHI/edit#

Bug: v8:8952
Change-Id: Ic96f9b16397149099f87380f68e01b1f2a6d5b90
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3018056Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#75685}