Reland  "Disable cursor opacity animation on macOS, make iOS cursor animation discrete (#104335)" (#106893)

This reverts commit 0d3cc92d.

* Fixed AnimatedSwitcher chain produced duplicates

* Fixed issue with global keys being copied

* trailing whitespace

* removed unused dependencies

* Fixed dependency loop

The pubRoot directory interface is being changed to promote adding and removing directories

Add `fromDirectional` factory to `RelativeRect` for when an app needs to consider both TextDirection.ltr and TextDirection.rtl.

```
RelativeRect.fromDirectional(
    textDirection: textDirection,
    start: 10.0,
    top: 20.0,
    end: 30.0,
    bottom: 40.0,
);
```

Addresses https://github.com/flutter/flutter/issues/107058.

* Pass URI converter from context to DDS

* Match change that will be merged

* Revert SDK web change

* Ensure build is done in incremental mode.

This allows for faster bootstrapping of the compiler from previously created dill file.

Fixes https://github.com/flutter/flutter/issues/107183

* Avoid initializeFromDill in aot mode

* Update tests