FED-4063 Set up gha-dart-oss

[sydneyjodon-wk]

We should set up gha-dart-oss so we can:

• take advantage of shared workflows
• use the publish workflow to auto-publish on merge 🎉

QA instructions

• CI passes
• All steps previously run in CI are still running even if some of them are in the shared jobs now
• When this merges, follow along to make sure the package actually publishes

[sydneyjodon-wk]

because I changed this name, I'll update Rosie to look for the updated check names before we merge this

[greglittlefield-wf]

#nit this job also has a couple checks on generated files (that they're up to date, that things analyze cleanly before/after a build); could we update the name to reflect that?

Suggested change

	test:
	test_and_check_generated_files:

[greglittlefield-wf]

+1

[greglittlefield-wf]

#nit this job also has a couple checks on generated files (that they're up to date, that things analyze cleanly before/after a build); could we update the name to reflect that?

Suggested change

	test:
	test_and_check_generated_files:

[greglittlefield-wf]

tl;dr we're good, posting for posterity

At first I thought this wasn't going to work once we switch to Dart 3, since it doesn't have --force (see here), and this repo currently has warnings when analyzing the files in tools/analyzer_plugin.

But, it looks like they fixed that in dart-lang/pub#3630 (somewhere from Dart 3.3.0 to 3.4.0), so we don't have to worry about it!

In 3.4.0+, there's only a warning about tools/, but I don't think that'll prevent the package from publishing:

Validating package... (8.2s)
Package validation found the following potential issue:
* Rename the top-level "tools" directory to "tool".
  The Pub layout convention is to use singular directory names.
  Plural names won't be correctly identified by Pub and other tools.
  See https://dart.dev/tools/pub/package-layout.
The server may enforce additional checks.

Package has 1 warning.

So we're all good here; just wanted to note that!

[sydneyjodon-wk]

Nice! Yeah I was wondering if that thread was solved in some other way! Thanks for checking!

[greglittlefield-wf]

+10

[sydneyjodon-wk]

@Workiva/release-management-p

[rmconsole-wf]

+1 from RM