Roll Dart SDK from 5a666e8d8259 to 38e8459ca2aa (4 revisions) (#47426)

https://dart.googlesource.com/sdk.git/+log/5a666e8d8259..38e8459ca2aa

2023-10-28 [email protected] Version 3.3.0-75.0.dev
2023-10-28 [email protected] Version 3.3.0-74.0.dev
2023-10-28 [email protected] Version 3.3.0-73.0.dev
2023-10-27 [email protected] Version 3.3.0-72.0.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 [email protected],[email protected] 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

Author: skia-flutter-autoroll

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': '5a666e8d8259098182eb89ea48ac271e4efab751',
+  'dart_revision': '38e8459ca2aa9be51745f261b21fde8ab7e5caad',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_dart

@@ -1,4 +1,4 @@
-Signature: 022906f4ce02fdc2054c23c803c5cffe
+Signature: d1bb16a91d8cfdd279257e15cc3032e4
 
 ====================================================================================================
 LIBRARY: dart