Refactor `SliverAppBar.medium` & `SliverAppBar.large` to fix several issues

Explain how to do the two-step migration to the context menus feature.

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Bump actions/checkout from 3.5.0 to 3.5.1

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Update re-thrown error for incompatible Java/Gradle versions to include migration guide

Localize the 'No Replacements Found' spell check string

Roll Flutter Engine from 8baab9d01ad2 to f1c694951a52 (5 revisions)

Update runner to handle logic for both analytics packages

`SemanticsFlag`/`SemanticsAction` cleanup (part 4)

[ci.yaml] Disable packaging_test on release candidates

Marks Linux firebase_abstract_method_smoke_test to be flaky

Marks Linux_samsung_s10 new_gallery_impeller__transition_perf to be flaky

Marks Mac_ios animated_blur_backdrop_filter_perf_ios__timeline_summary to be unflaky

Marks Linux_android animated_blur_backdrop_filter_perf__timeline_summary to be unflaky

Remove the old canvaskit artifacts to not confuse the web runner.

Marks Linux_android new_gallery_impeller__transition_perf to be flaky

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Bug report 2 issue template

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Reverts flutter/flutter#122437

This is causing several Android devicelab tests to fail on the first
attempt, causing them to be marked flaky. The cause appears to be
unexpected output on stderr. See:
https://ci.chromium.org/ui/p/flutter/builders/prod/Mac_arm64_android%20run_release_test/5390/overview

Roll Flutter Engine from ad0e2144a05f to 2123f462f463 (3 revisions)

Add `StrokeCap` to `CircularProgressIndicator`

Roll Flutter Engine from 96cb2f5617bb to ad0e2144a05f (8 revisions)

Exposed EdgeDraggingAutoScroller velocityScalar to ReorderableList

flutter_tools: Flutter Web CLI cleanup

DraggableScrollableSheet & NestedScrollView  should respect NeverScrollableScrollPhysics

Internal bug: b/256596915

Turns out we need to regenerate date localizations in order for the
`intl` package to be setup properly within Flutter. This PR fixes the
script (since it assumes the use of the old `.packages` way of handling
packages), and regenerates the `generated_date_localizations.dart` file.