Avoid uploading databases after integration tests

We are still getting coverage of the upload capability through the
standard codeql analysis workflow.

pr-checks/checks/split-workflow.yml

@@ -16,6 +16,7 @@ steps:
     with:
       skip-queries: true
       output: "${{ runner.temp }}/results"
+      upload-database: false
 
   - name: Assert No Results
     shell: bash