[backend] Improve entity type validation in deletion operations

[maelv-filigran]

Proposed changes

• Enforce type validation in stixDomainObjectDelete with expectedEntityType parameter for stricter entity type checking
• Updated Individual resolver to use the new type-checking deletion method
• Added comprehensive integration tests for entity type validation in deletion operations

Related issues

• Improves data integrity by ensuring delete operations target the correct entity types
• Prevents accidental deletion of wrong entities through type-specific endpoints

Checklist

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

[codecov[bot]]

Codecov Report

:x: Patch coverage is 92.74194% with 9 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 30.83%. Comparing base (26a4bae) to head (65a6c88). :warning: Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
...opencti-graphql/src/modules/case/case-resolvers.ts	77.77%	2 Missing :warning:
...i-platform/opencti-graphql/src/resolvers/report.js	66.66%	2 Missing :warning:
...ncti-platform/opencti-graphql/src/domain/report.js	0.00%	1 Missing :warning:
...orm/opencti-graphql/src/domain/stixDomainObject.js	96.29%	1 Missing :warning:
...platform/opencti-graphql/src/resolvers/identity.js	50.00%	1 Missing :warning:
...platform/opencti-graphql/src/resolvers/location.js	50.00%	1 Missing :warning:
...form/opencti-graphql/src/resolvers/observedData.js	50.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #13356      +/-   ##
==========================================
+ Coverage   30.65%   30.83%   +0.18%     
==========================================
  Files        2906     2906              
  Lines      192005   192099      +94     
  Branches    39088    39254     +166     
==========================================
+ Hits        58851    59229     +378     
+ Misses     133154   132870     -284     

Flag	Coverage Δ
opencti	30.83% <92.74%> (+0.18%)	:arrow_up:
opencti-front	2.47% <ø> (ø)
opencti-graphql	68.24% <92.74%> (+0.37%)	:arrow_up:

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