Reverts "Roll Dart SDK from 88d311c9a531 to 995324d1b218 (1 revision) (#54896)"

[auto-submit]

Reverts: #54896

Initiated by: zanderso

Reason for reverting: Reverting Dart rolls for an issue with dart fix.

Original PR Author: skia-flutter-autoroll

Reviewed By: {fluttergithubbot}

This change reverts the following previous change:

https://dart.googlesource.com/sdk.git/+log/88d311c9a531..995324d1b218

2024-08-30 [email protected] Version 3.6.0-200.0.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

[flutter-dashboard]

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If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

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