chore: Bump go version v1.24.8

[thomaspoignant]

Description

In order to fix GO CVEs this PR is bumping GO to v1.24.8.

This PR is also adding a better clean function in the makefile.

Checklist

• I have tested this code
• I have followed the contributing guide

[netlify]

✅ Deploy Preview for go-feature-flag-doc-preview canceled.

Name	Link
🔨 Latest commit	3f1b6cb
🔍 Latest deploy log	https://app.netlify.com/projects/go-feature-flag-doc-preview/deploys/6908e29277f002000893d2da

[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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.98%. Comparing base (9b7904c) to head (3f1b6cb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4222   +/-   ##
=======================================
  Coverage   84.98%   84.98%           
=======================================
  Files         140      140           
  Lines        5660     5660           
=======================================
  Hits         4810     4810           
  Misses        644      644           
  Partials      206      206           

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