[identity] Reset device list and services data during password reset

Summary:
Address ENG-9845.

Depends on D14076

Test Plan:
Mocked the password reset RPC to accept me as a privileged admin, then called it. Confirmed that all devices were removed from DDB and other services. Device list became empty array.
I could then log in with a new password.

Reviewers: kamil, varun

Reviewed By: kamil

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D14087