Add aedp_vadx feature toggle for experimental work safeguard

[adamwhitlock1]

Are you removing, renaming or moving a folder in this PR?

• No, I'm not changing any folders (skip to TeamSites and delete the rest of this section)
• Yes, I'm removing, renaming or moving a folder

Did you change site-wide styles, platform utilities or other infrastructure?

• No
• Yes, and I used the proxy-rewrite steps to test the injected header scenario

Summary

• adds a toggle for work on the Authenticated Experience Design Patterns prototype app
• toggle not used yet, but will be in a future PR to add some tooling for the team
• toggle will be exclusively used by this team for non-production work around design patterns

Related issue(s)

• Discovery - In-Browser Developer Tools Panel - VADX tmf-auth-exp-design-patterns#196

Testing done

• verified that feature toggle is available locally and through mock server for aedp mock app

Screenshots

No UI changes just adding toggle

What areas of the site does it impact?

AEDP mock form, but really nothing impacted yet

Acceptance criteria

• toggle added

Quality Assurance & Testing

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Linting warnings have been addressed
• Documentation has been updated (link to documentation *if necessary)
• Screenshot of the developed feature is added
• Accessibility testing has been performed

Error Handling

• Browser console contains no warnings or errors.
• Events are being sent to the appropriate logging solution
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)

Authentication

• Did you login to a local build and verify all authenticated routes work as expected with a test user

[bellepx0]

Approved!

[adamwhitlock1]

@rsmithadhoc and @bellepx0 when yall have a moment, could you re-approve. I found an issue with the casing of the toggle, so had to fix that so that it would behave correctly. Thanks!