[Backend] Move PasswordReset*Data classes to Models

[imnasnainaec]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.87%. Comparing base (4a8dcce) to head (3116227).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3835      +/-   ##
==========================================
- Coverage   72.92%   65.87%   -7.06%     
==========================================
  Files         286      235      -51     
  Lines       10768     6033    -4735     
  Branches     1340      753     -587     
==========================================
- Hits         7853     3974    -3879     
+ Misses       2515     1815     -700     
+ Partials      400      244     -156     

Flag	Coverage Δ
backend	?
frontend	65.87% <ø> (ø)

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