[VACMS-19506]Remove aria-labelledby from fullwidth banner alerts

[SnowboardTechie]

Summary

• Removes the aria-labelledby from fullwidth banner alerts
• This was generating errors in AMP due to it creating labels without corresponding ids
• Sitewide team
• These fullwidth banner alerts are behind a flipper as a backup to real-time banners from the vets-api

Related issue(s)

• Issue: Remove aria-labelledby from VAMC Banner va.gov-cms#19506 (comment)

Testing done

• Confirmed when the flipper to use alternative banners is disabled, content build creates fullwidth-banner-alerts without the corresponding aria-labelledby attributes.

What areas of the site does it impact?

The no longer utilized VAMC fullwidthBannerAlerts

Acceptance criteria

• aria-labelledby attribute is removed from the div that holds the content-build VAMC banners

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

[randimays]

LGTM

[laflannery]

@SnowboardTechie you're a star, approved!