Fix health

[brianquinlan]

• Check all of the Dart packages in one workflow and the Flutter ones in separate workflows.

---

• I’ve reviewed the contributor guide and applied the relevant portions to this PR.

Contribution guidelines:

• See our contributor guide for general expectations for PRs.
• Larger or significant changes should be discussed in an issue before creating a PR.
• Contributions to our repos should follow the Dart style guide and use dart format.
• Most changes should add an entry to the changelog and may need to rev the pubspec package version.
• Changes to packages require corresponding tests.

Note that many Dart repos have a weekly cadence for reviewing PRs - please allow for some latency before initial review feedback.

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:http2	2.3.1	ready to publish	http2-v2.3.1
package:cronet_http	1.3.3-wip	WIP (no publish necessary)
package:http	1.2.3-wip	WIP (no publish necessary)
package:http_parser	4.1.1	already published at pub.dev
package:http_profile	0.1.1-wip	WIP (no publish necessary)
package:ok_http	0.1.1-wip	WIP (no publish necessary)
package:web_socket	0.1.6	already published at pub.dev
package:cupertino_http	1.5.2-wip	(error) pubspec version (1.5.2-wip) and changelog (2.0.0-wip) don't agree

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.