[3.36] Create `engine.version` (#173749)

Pointing at 877970c.

[3.35] Update `CHANGELOG.md` for 3.35.0 + 3.35.1 (#173787)

Note #173785.

[3.35] Update `engine.version` (#173748)

For 1e9a811.

[CP beta] Use LLDB as the default debugging method for iOS 17+ and Xc…

…ode 26+ (#173443) (#173472)

Please fill in the form below, and a flutter domain expert will evaluate this cherry pick request.

### Issue Link:
Part 2 of #144218

### Changelog Description:
Explain this cherry pick in one line that is accessible to most Flutter developers. See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples

Implementation of a future fix to allow Xcode 26 to `flutter run` twice in a row.

### Impact Description:
What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)? Does it impact development (ex. flutter doctor crashes when Android Studio is installed), or the shipping production app (the app crashes on launch)

Flutter developers running Xcode 26 can `flutter run` to a tethered iOS device once. However subsequent `flutter run` attempts are likely to fail. 

### Workaround:
Is there a workaround for this issue?

Quitting and reopening Xcode.

### Risk:
What is the risk level of this cherry-pick?

### Test Coverage:
Are you confident that your fix is well-tested by automated tests?

### Validation Steps:
What are the steps to validate that this fix works?

Create a flutter project and run `flutter run` twice in a row with a physical iOS 17+ device and Xcode 26.

Update engine.version again for 3.35-0.2 (#173116)

The most recent change to fix CI on the beta branch actually touches engine unit tests, so we need to bump the engine.version again.

Update CHANGELOG.md for 3.32.8 (#172712)

https://github.com/flutter/flutter/commits/flutter-3.32-candidate.0/

[3.35] Update `engine.version` (#172473)

to use, correctly, 1c9c20e.

[3.35] Update `engine.version` (+CPs Use `release-*.version`) (#172237)

Cherrypick's #172236 into the 3.35 release branch _and_ tests it live by setting `engine.version` in this PR.

[3.32] Update `engine.version`/`CHANGELOG.md` (#172192)

Prepares to publish `3.32.7`.

Update `engine.version` for 3.32.6 stable hotfix release (#171791)

Updates `engine.version` for 3.32.6 stable hotfix release to the last cherry-pick SHA with an engine change: 72f2b18