fix: eslint settings for simple_rest_signatature_provider

[ivaylonikolov7]

Description:
This PR fixes the config file for ESLint. Due to bump of major version ESLint changed the way they work with config files and we needed to create a new one. For more information - https://eslint.org/docs/latest/use/migrate-to-9.0.0#flat-config

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.78%. Comparing base (932d93f) to head (f806064).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2624      +/-   ##
==========================================
- Coverage   84.79%   84.78%   -0.01%     
==========================================
  Files         284      284              
  Lines       71253    71253              
==========================================
- Hits        60421    60414       -7     
- Misses      10832    10839       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.