FEA-4583: Support packages that don't utilize dart_dev

[matthewnitschke-wk]

FEA-4583

Its pretty common for our oss libs to not implement dart_dev, and we dont necessarily want to make that a requirement

This pr allows running the checks workflow without dart_dev so it can pass on repos like Workiva/webdev_proxy

Note, test-unit has been left alone, this still requires dart_dev. I haven't decided on if its best to try and figure out how to make that optional? or just have oss repos run dart test manually

[aviary3-wk]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure
• Verify aviary.yaml coverage of security relevant code

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Questions or Comments? Reach out on Slack: #support-infosec.

[evanweible-wf]

I messaged Nitschke on Slack but will post here for visibility:

• I think we could simplify the test-unit workflow a bit by removing a couple of inputs that shouldn't be needed.
• If the overhead for detecting ddev and/or build_runner + build_test is too much, we could consider creating separate reusable workflows for each use case: dart test, build_runner test, and ddev test.

[matthewnitschke-wk]

QA +1

• CI does indeed pass

🚀 @Workiva/release-management-p 🚢

[rmconsole-wf]

+1 from RM