.github: namespace itests

Since we have multiple itest artefacts with the same name now, we need
to ensure they have different names or else the upload will fail.

Author: ellemouton

.github/workflows/main.yml

@@ -318,8 +318,8 @@ jobs:
         uses: actions/upload-artifact@v4
         if: ${{ failure() }}
         with:
-          name: logs-itest
-          path: logs-itest.zip
+          name: logs-itest-${{ matrix.name }}
+          path: logs-itest-${{ matrix.name }}.zip
           retention-days: 5
 
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