Roll Dart SDK from 2791495ed583 to 73fa7b3e048a (1 revision) (flutter/engine#47304)

https://dart.googlesource.com/sdk.git/+log/2791495ed583..73fa7b3e048a

2023-10-25 dart-internal-merge@dart-ci-internal.iam.gserviceaccount.com Version 3.3.0-59.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC aaclarke@google.com,dart-vm-team@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter Engine: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

DEPS

@@ -57,7 +57,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/main/DEPS
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '2791495ed5837bdcebfad30c9a23af637d7db5f5',
+  'dart_revision': '73fa7b3e048aa36fb411474b271de1060ccc06f9',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py