[backend/frontend] add configuration to have better chances to get RSS Feed contents (#8736)

[aHenryJard]

Proposed changes

Adding several configuration to get better chance to avoid HTTP 403 from public RSS Feed:

• ingestion_manager.rss_feed.min_interval_minutes : wait for at least N minutes before next HTTP call for RSS Feed
• ingestion_manager.rss_feed.user_agent: allow to overide user agent used in header for RSS Feed requests
• ingestion_manager.csv_feed.min_interval_minutes : wait for at least N minutes before next HTTP call for CSV Feed

Adding some info and warn level log:

• Info to know if an HTTP Call has been skipped because of min_interval_minutes or queue states
• warn in case of 403 coming from a cloudflare challenge to know that it's not a credential issue.

Doc PR OpenCTI-Platform/docs#231

Related issues

• closes [RSS Feed] Error 403 on accessible public feeds #8736

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

Attention: Patch coverage is 21.62162% with 29 lines in your changes missing coverage. Please review.

Project coverage is 65.23%. Comparing base (f681660) to head (75e4440).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
...rm/opencti-graphql/src/manager/ingestionManager.ts	17.14%	29 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9244      +/-   ##
==========================================
- Coverage   65.26%   65.23%   -0.03%     
==========================================
  Files         630      630              
  Lines       60244    60273      +29     
  Branches     6760     6765       +5     
==========================================
+ Hits        39319    39320       +1     
- Misses      20925    20953      +28     

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