Unset essential environment variables for C++ and C# in test

Author: edoardopirovano

.github/workflows/__multi-language-autodetect.yml

@@ -8,7 +8,7 @@ steps:
       tools: ${{ steps.prepare-test.outputs.tools-url }}
   - name: Build code
     shell: bash
-    run: ./build.sh
+    run: env --unset=LD_PRELOAD --unset=CODEQL_EXTRACTOR_CPP_SOURCE_ARCHIVE_DIR --unset=CODEQL_EXTRACTOR_CSHARP_SOURCE_ARCHIVE_DIR ./build.sh
   - uses: ./../action/analyze
     id: analysis
     env: