[server-test] Install libs for i386 tests

[pappz]

Describe your changes

Install i386 dependencies to fix this:

In file included from _cgo_export.c:3:
/usr/include/stdlib.h:26:10: fatal error: bits/libc-header-start.h: No such file or directory
   26 | #include <bits/libc-header-start.h>

Issue ticket number and link

Stack

Checklist

• Is it a bug fix
• Is a typo/documentation fix
• Is a feature enhancement
• It is a refactor
• Created tests that fail without the change (if possible)
• Extended the README / documentation, if necessary

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[Copilot]

Pull Request Overview

This PR adds a step in the GitHub Actions workflow to install dependencies required for running i386 tests.

• Adds an "Install dependencies" step using apt to update the package list and install gcc-multilib, g++-multilib, and libc6-dev-i386
• Executes the new step only when the cache is not hit

[Copilot]

Consider adding an inline comment to explain the need for installing gcc-multilib, g++-multilib, and libc6-dev-i386 for i386 tests. This will improve the maintainability and clarity of the workflow.

[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