Dart 2.19

[sourcegraph-wk]

Summary

This batch updates CI to use Dart 2.19. In most cases, updating Just Works™,
but here's some things that have changed or may cause problems while updating.

• The pub and dart2js aliases have been removed. You may need to replace bare pub commands. See the replacements here https://wiki.atl.workiva.net/display/CP/Dart+2.18+FAQ
• There may be some new lints, or lints that actually function better and now find new issues that need fixing or ignoring.
• Some lints may have been raised to warnings that now need fixing or ignoring until fixed.
• Dockerfiles or skynet may try to install things that don't work quite right on newer debian 11 (bullseye)
  • Potential examples are installing python or nodejs into the dart images
• If you have build.yaml files that "split" the builders into separate targets, you may have to exclude a new builder

  build_resolvers|transitive_digests:
    enabled: false

These PRs are ok to get reviewed and approved.
If it is out of draft and there isn't a `Hold`` label, then it is ok to merge.

For support go to #support-frontend-dx in Slack.

Created by Sourcegraph batch change Workiva/dart_2_19.

[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.

[todbachman-wf]

QA +1. @Workiva/release-management-pp

[rmconsole-wf]

+1 from RM