Add ESLint rule for the ExpandingGroup React component

[jamigibbs]

Description

This will add a warning for the ExpandingGroup React component's deprecation.

The warning message will read:

The ExpandingGroup React component is deprecated. Please replace with a custom solution. Also note that the wizard pattern is deprecated as well. See "Retrofit this pattern" for additional guidance if needed: https://design.va.gov/patterns/wizards#retrofit-this-pattern

Related issue: department-of-veterans-affairs/vets-design-system-documentation#1378

Testing done

VS Code
vets-website locally

Acceptance criteria

• A ESLint warning message displays where the ExpandingGroup react component is used.

Definition of done

• Changes have been tested in vets-website
• Changes have been tested in IE11, if applicable
• Documentation has been updated, if applicable
• A link has been provided to the originating GitHub issue (or connected to it via ZenHub)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs