[backend] remove LRU session cache in redis session store (#13855)

[JeremyCloarec]

Proposed changes

• remove LRU session cache in redis session store to prevent in memory session temporary desync

Related issues

• fix "otpValidated" user status is not persisted across opencti-graphql instances #13855

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 33.12%. Comparing base (b7ced05) to head (9db3094).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...opencti-graphql/src/database/sessionStore-redis.js	0.00%	8 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #15362   +/-   ##
=======================================
  Coverage   33.12%   33.12%           
=======================================
  Files        3155     3155           
  Lines      214056   214047    -9     
  Branches    39111    39111           
=======================================
- Hits        70904    70903    -1     
+ Misses     143152   143144    -8     

Flag	Coverage Δ
opencti-client-python	45.59% <ø> (ø)
opencti-front	2.87% <ø> (ø)
opencti-graphql	69.09% <0.00%> (+<0.01%)	⬆️

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