This is a reland of df1676e6

Original change's description:
> [array] Implement Array.p.sort in Torque
>
> This CL implements a generic baseline version and 3 fastpaths, for
> various elements kinds, of Array.p.sort in Torque. Details can be found
> in the Design Doc: https://goo.gl/Ge321G.
>
> Performance impact on micro benchmarks depends on the element kind
> and whether the user provides a comparison function.
> For HoleySmi/HoleyElement we have a speedup between 1.5-1.8 across
> the board. For Dictionary we are slower in all micro benchmarks (0.7).
> For PackedSmi it depends on the call site and whether or not a
> comparison function is used.
>
> Detailed numbers: https://goo.gl/mTyPSb
>
> Bug: v8:7382
> Change-Id: I50acabd2032af0bc01d36b0de0f555d66be56a7e
> Reviewed-on: https://chromium-review.googlesource.com/1061523
> Commit-Queue: Simon Zünd <szuend@google.com>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53481}

Bug: v8:7382,v8:7806,chromium:849293
Change-Id: I176cb660d92eb174bd91685cb0a39f50c4cbaa69
Reviewed-on: https://chromium-review.googlesource.com/1086827Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#53511}