This is a reland of 9ca89ac1

Original change's description:
> Add option to git cl st to sort by committer date
>
> Some developers want to see the branches with recent commits first.
> This CL adds the option --dateorder to git cl st which sorts branches
> by the committer date of the most recent branch.
>
> Change-Id: Ibdf3fc35ea784521a3e99b374535f822bb83a55e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2521573
> Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
> Reviewed-by: Josip Sokcevic <sokcevic@google.com>
> Reviewed-by: Dirk Pranke <dpranke@google.com>

Change-Id: I974ac297fcf8652855b101f58a98b3cd122fce36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2532835
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Dirk Pranke <dpranke@google.com>