"late final" fields not included in completion suggestions

[Lootwig]

Observed using Dart 3.6.0-278.0.dev, both in IntelliJ and VS Code.

[dart-github-bot]

Summary: The issue reports that "late final" fields are not appearing in code completion suggestions in both IntelliJ and VS Code, when using Dart 3.6.0-278.0.dev. This behavior is unexpected and hinders developer productivity.

[FMorschel]

I've opened this CL for this https://dart-review.googlesource.com/c/sdk/+/393043