[SERVICES-2112] upgrade native auth server

[claudiulataretu]

Reasoning

• fix impersonate on native auth server

Proposed Changes

• upgraded native-auth-server package to 1.0.15
• added custom impersonate callback

How to test

• N/A

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7af556f) 56.41% compared to head (cd68fad) 56.43%.
Report is 4 commits behind head on development.

Additional details and impacted files

@@               Coverage Diff               @@
##           development    #1282      +/-   ##
===============================================
+ Coverage        56.41%   56.43%   +0.02%     
===============================================
  Files              236      236              
  Lines             7922     7926       +4     
  Branches           527      527              
===============================================
+ Hits              4469     4473       +4     
  Misses            3004     3004              
  Partials           449      449              

Flag	Coverage Δ
unittests	56.43% <ø> (+0.02%)	⬆️

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