This is a reland of 856e8577
The diff compared to the first attempt is that the tests that
require SSSE3/AVX are not run when these CPU features are not
available.

Original change's description:
> [dict-proto] SIMD support for SwissNameDictionary in Torque
>
> This CL adds a Torque-counterpart for swiss_table::GroupSse2Impl in
> Torque. This allows the Torque version of SwissNameDictionary to use
> SSE for lookups, rather than needing to bailout to the runtime on
> x64/ia32.
>
> Bug: v8:11330
> Change-Id: I74e3f97c460a8b89031016967ec0e545265016a9
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2787485
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
> Reviewed-by: Zhi An Ng <zhin@chromium.org>
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73727}

Bug: v8:11330
Cq-Include-Trybots: luci.v8.try:v8_linux_optional_rel_ng
Change-Id: Ibfa5ae5a39333778ea0d0406d5ea4ad683ad0dbe
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2794431Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73740}