CPLAT-15165 Fix bug when using `--hostname` option

[evanweible-wf]

When trying to pass an option like --hostname=0.0.0.0 from webdev_proxy to the webdev process, we were unintentionally passing the option through twice, which causes a newer version of the build daemon to fail to start.

This PR fixes this by stripping that option and its value out after parsing it.

Additionally, CI has been moved to Github and tests have been updated to work with the latest Chrome and Chromedriver.

Testing

• [ ] CI passes
• [ ] Test this branch locally on Dart 2.7.2
  • Check out this branch
  • Comment out all dev_dependencies (pub global activate from path seems to run a pub get which will fail b/c two of the dev deps needed for tests require dart 2.12+)
  • Run pub global run webdev_proxy --webdev-args="--hostname=0.0.0.0" in any project with a web/

[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

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

[alanknight-wk]

QA +1 The instructions aren't quite right (it seems to be just --, not --webdev-args), but it runs and serves with that.

[evanweible-wf]

Oh whoops, sorry about that! Got mixed up between ddev serve and webdev_proxy serve - thanks for the qa!

[evanweible-wf]

@Workiva/release-management-p