[terra-functional-testing] Add flag to disable internal webpack server

[sdadn]

Summary

This PR adds the --disable-server flag to the terra-functional-testing wdio command to disable the internal webapck server for local development. This will allow developers to use another webpack service, such as from npm start which can help speed up development if that is already running.

Testing

This change was tested using:

• [ ] WDIO
• [x] Jest
• [ ] Visual testing (please attach a screenshot or recording)
• [x] Other (please describe below)
• [ ] No tests are needed

This was tested by installing a local copy of terra-functional-testing with these changes in terra-framework, running npm start in a terminal and running wdio tests with the --disable-server flag in another server. The wdio service managed to connect to the external webpack server and tests were able to run successfully.

Reviews

In addition to engineering reviews, this PR needs:

• [ ] UX review
• [ ] Accessibility review
• [ ] Functional review

Additional Details

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Thank you for contributing to Terra. @cerner/terra

[kenk2]

I'm noticing that quite a few of the CLI params are being changed. How will this affect consumers downstream?

[sdadn]

I'm noticing that quite a few of the CLI params are being changed. How will this affect consumers downstream?

This is mainly updating the documentation as kebab case is the convention for cli params. This won't affect consumers as the cli accepts both kebab case and camel case for parameters.