… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

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<!-- start_original_pr_link -->
Reverts: flutter#170374
<!-- end_original_pr_link -->
<!-- start_initiating_author -->
Initiated by: jtmcdole
<!-- end_initiating_author -->
<!-- start_revert_reason -->
Reason for reverting: "Consistently failed across all 3 executions"
<!-- end_revert_reason -->
<!-- start_original_pr_author -->
Original PR Author: dcharkes
<!-- end_original_pr_author -->

<!-- start_reviewers -->
Reviewed By: {vashworth, bkonyi}
<!-- end_reviewers -->

<!-- start_revert_body -->
This change reverts the following previous change:
Closes: flutter#168961

This PR ensures the build hooks of `dev_dependencies` are run on
`flutter test integration_test`.

`flutter test` already builds dev dependencies. However,
`package:integration_test` is using `flutter assemble` which should not
have dev dependencies included (`flutter build` should not bundle dev
deps).

~~So, this PR adds a build define that's threaded through from `flutter
test` to `flutter assemble`. It's threaded through gradle and xcode via
`BuildInfo` and subsequently read in tool backend where it is added as
an `Environment` define. Finally it is read in the `Target` that builds
the native assets.~~

~~One quirk is `flutter run test integration_test -d flutter-tester`.
(No idea why someone would run that, but it works.) This doesn't spin up
Gradle or XCode. So the environment is set directly.~~

Edit: We use the simpler `kBuildMode` to decide whether to include the
native assets for dev dependencies.

## Testing

* The desktop OSes and `flutter-tester` are tested in
`packages/flutter_tools/test/integration.shard/isolated/native_assets_test.dart`.
* iOS simulator, device, and Android device are tested in the device
lab.
* (All tests were added to existing tests, hopefully these don't start
timing out.)

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

<!-- end_revert_body -->

Co-authored-by: auto-submit[bot] <[email protected]>

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)

… test integration_test` (#170374)" (flutter/flutter#170673)