HasRole endpoint not working

[yuanchen233]

1. update the return type to Boolean
2. user accessing resources outside of scope should not be handled here (no 400 exceptions throw here)
3. Error handling: 404 if account not found, and also fix error handling for other endpoints in AccountController

[yuanchen233]

This was brought up during http-client-rewrite.
However, where is this endpoint currently used. and how is it expected to work?
If this is something before introducing Claims and no longer used, we should consider removing it.
or, find the correct use case and re-do requirement, since access control is managed by backend using Claims now