Pre-process coverage report with lcov before uploading

We had several strange issues with the coverage reports when we let
Codecov process the raw gcov files, including it for some reason not
believing Assert() statements being ran at all and some issues with
frontend vs backend code.

Author: jeltz

.github/workflows/coverage.yml

@@ -55,12 +55,20 @@ jobs:
       - name: Run pg_tde tests
         run: src/ci_scripts/test.sh
 
+      - name: Process coverage
+        run: |
+          geninfo -o coverage.info --no-external --rc lcov_branch_coverage=1 -i .
+          geninfo -o coverage.info --no-external --rc lcov_branch_coverage=1 .
+        working-directory: src
+
       - name: Upload coverage data to codecov.io
         uses: codecov/codecov-action@v5
         with:
           verbose: true
           fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}
+          disable_search: true
+          files: coverage.info
           working-directory: src
 
       - name: Report on test fail