This change is the first part of adding Torque support for a "bitfield
struct", which represents a set of bitfields packed together into an
integer value. With this change, Torque can generate the list of
BitField template specializations that allow runtime code to use the
bitfield values. The flags used in SharedFunctionInfo are converted to
Torque to exercise this functionality. Bitfield values are not yet
accessible directly from Torque code.

Bug: v8:7793
Change-Id: I9e4a3df7c847111b6e02e513f175dbf938b0be35
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1949047
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65371}