Reland "[co19] Roll co19 to ae818220b12ec9c2470519db2c7167cbe4745e12"

This reverts commit 88ee333.

Reason for revert: Hook added by mistake removed.

Original change's description:
> Revert "[co19] Roll co19 to ae818220b12ec9c2470519db2c7167cbe4745e12"
>
> This reverts commit 03e8ddd.
>
> Reason for revert: Change to hooks does not work with Windows.
>
> Original change's description:
> > [co19] Roll co19 to ae818220b12ec9c2470519db2c7167cbe4745e12
> >
> > 2021-03-22 sgrekhov@unipro.ru Fixes #1032. Change place where analyzer expects COMPILE_TIME_ERROR.UNCHECKED_USE_OF_NULLABLE_VALUE
> > 2021-03-22 sgrekhov@unipro.ru Fixes #1027. Typo fixed
> > 2021-03-22 sgrekhov@unipro.ru Fixes #1026. Missed experimental flag added
> > 2021-03-22 sgrekhov@unipro.ru Fixes SDK issue #45381. Use 32-bit int boundaries for 32-bit systems
> > 2021-03-19 sgrekhov@unipro.ru #1024. Tests that plays with the integers not representable in JS moved to separate files. These files will be skipped on JS
> >
> > Cq-Include-Trybots: dart/try:analyzer-nnbd-linux-release-try,dart2js-nnbd-linux-x64-chrome-try,ddc-nnbd-linux-release-chrome-try,front-end-nnbd-linux-release-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-nnbd-linux-release-simarm64-try,vm-kernel-nnbd-linux-release-x64-try,vm-kernel-nnbd-mac-release-x64-try,vm-kernel-nnbd-win-release-x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-precomp-nnbd-linux-release-simarm64-try,vm-kernel-precomp-nnbd-linux-release-x64-try
> > Change-Id: Idc63625a841f1f90b0cce5db9ca6add13e4d1192
> > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192303
> > Reviewed-by: William Hesse <whesse@google.com>
> > Commit-Queue: Alexander Thomas <athom@google.com>
>
> TBR=whesse@google.com,athom@google.com
>
> Change-Id: I5f66db541034377f5d68424073282080d13fd34b
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Cq-Include-Trybots: dart/try:analyzer-nnbd-linux-release-try
> Cq-Include-Trybots: dart2js-nnbd-linux-x64-chrome-try
> Cq-Include-Trybots: ddc-nnbd-linux-release-chrome-try
> Cq-Include-Trybots: front-end-nnbd-linux-release-x64-try
> Cq-Include-Trybots: vm-kernel-nnbd-linux-debug-x64-try
> Cq-Include-Trybots: vm-kernel-nnbd-linux-release-simarm64-try
> Cq-Include-Trybots: vm-kernel-nnbd-linux-release-x64-try
> Cq-Include-Trybots: vm-kernel-nnbd-mac-release-x64-try
> Cq-Include-Trybots: vm-kernel-nnbd-win-release-x64-try
> Cq-Include-Trybots: vm-kernel-precomp-nnbd-linux-debug-x64-try
> Cq-Include-Trybots: vm-kernel-precomp-nnbd-linux-release-simarm64-try
> Cq-Include-Trybots: vm-kernel-precomp-nnbd-linux-release-x64-try
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192380
> Reviewed-by: William Hesse <whesse@google.com>

# Not skipping CQ checks because this is a reland.

Change-Id: Ie54fde2d92d1b2cdb3b70835f1f8c17e3c5ac477
Cq-Include-Trybots: dart/try:analyzer-nnbd-linux-release-try,dart2js-nnbd-linux-x64-chrome-try,ddc-nnbd-linux-release-chrome-try,front-end-nnbd-linux-release-x64-try,vm-kernel-nnbd-linux-debug-x64-try,vm-kernel-nnbd-linux-release-simarm64-try,vm-kernel-nnbd-linux-release-x64-try,vm-kernel-nnbd-mac-release-x64-try,vm-kernel-nnbd-win-release-x64-try,vm-kernel-precomp-nnbd-linux-debug-x64-try,vm-kernel-precomp-nnbd-linux-release-simarm64-try,vm-kernel-precomp-nnbd-linux-release-x64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192384
Reviewed-by: Alexander Thomas <athom@google.com>
Reviewed-by: William Hesse <whesse@google.com>

DEPS

@@ -44,7 +44,7 @@ vars = {
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd
   # has.
-  "co19_rev": "1abf208ef6428aac8fee6f3175d65b1c59cd15c8",
+  "co19_rev": "ae818220b12ec9c2470519db2c7167cbe4745e12",
   "co19_2_rev": "cf6eed0535e45413672bb5bb6e65df9f59846372",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
@@ -654,8 +654,6 @@ deps_os = {
   }
 }
 
-# TODO(iposva): Move the necessary tools so that hooks can be run
-# without the runtime being available.
 hooks = [
   {
     "name": "firefox_jsshell",