* Use cipd for jsshell.
* Add script to update jsshell.
* Add new CIPD namespace, with access rights for some web team members.
* Add a copy of the new package to the old location (b/186078239).
Change-Id: I0169d077af6b0d5119fe8545272ca1df1596558f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196324
Auto-Submit: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
Commit-Queue: William Hesse <whesse@google.com>
Reviewed-by: William Hesse <whesse@google.com>
