ci: statically link MinGW runtime into x86 fuzzy.dll and add 32-bit pool test

[A13501350]

Summary

Fixes #3599

The CI-produced x86 IIS module (fuzzy.dll, ssdeep) was built with MinGW gcc and imported the MinGW runtime DLLs (libgcc_s_dw2-1.dll -> libwinpthread-1.dll). These were not packaged in the MSI, so the x86 module failed to load in 32-bit application pools with error 126 (ERROR_MOD_NOT_FOUND), while the x64 module worked fine.

Fix

In .github/workflows/test-ci-windows.yml, build ssdeep with -static-libgcc so the MinGW runtime is statically linked into fuzzy.dll. The resulting x86 DLL is self-contained and loads cleanly in 32-bit application pools without needing the external MinGW runtime DLLs.

Regression test

Added a new Test IIS Module in 32-bit Application Pool step that:

1. Verifies the globally-registered ModSecurity IIS (32bits) native module exists.
2. Creates a dedicated 32-bit application pool and site, then confirms a request returns HTTP 200.
3. Checks the Application event log for dll failed to load / error 126 entries.

The test was validated against the previous (broken) build: with the old dynamic-link build the 32-bit pool returned HTTP 503 (module failed to load) and the step correctly failed; with this fix it returns HTTP 200 and passes.

Validation

• Fixed build: all jobs green, including the new 32-bit pool test (HTTP 200, no load errors).
• Old build (temporary revert): the new 32-bit pool test correctly failed with unexpected status 503, confirming it reproduces and catches the x86 load issue.

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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