Add ability to fetch profile data via additional fields
The [AccountService](https://gitlab.eclipse.org/eclipsefdn/it/api/eclipsefdn-api-common/-/blob/main/efservices/src/main/java/org/eclipsefoundation/efservices/services/AccountService.java) only currently supports authenticated user search.
Many of our services rely on getting a user profile via a Github handle or EF username. To help eliminate code duplication across our repos, we should add support for these requests to the `ProfileAPI` and `AccountService` within the `EfServices` module.
issue