fix(relayproxy): Remove Timeout middleware

[thomaspoignant]

Description

The Timeout middleware is bringing more problems than it solves (see #2758), since as the maintainer of echo are saying this is better not to use it rather trying to solve all the issues it brings.

sigh I really dislike this middleware because it so complex and has so many hidden "features" and I'm too dumb to fix all those problems in a reasonable way.

I have decided to stop trying to manage a server timeout, this gonna be the client responsibility to handle it (and we will handle it in the different OpenFeature providers).

Note

This breaking change is minimal, if you continue to use the property restApiTimeout in your configuration file, it will be ignored.

Checklist

• I have tested this code
• I have added unit test to cover this code
• I have updated the documentation (README.md and /website/docs)
• I have followed the contributing guide

[netlify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.79%. Comparing base (5a6108d) to head (4a78f0e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2864      +/-   ##
==========================================
+ Coverage   84.77%   84.79%   +0.02%     
==========================================
  Files         111      111              
  Lines        5207     5195      -12     
==========================================
- Hits         4414     4405       -9     
+ Misses        628      625       -3     
  Partials      165      165              

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[sonarqubecloud]

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 SonarQube Cloud