Fix codecov-action params

* `functionalities` param is no longer exist.
  It was used to enable file fixes to ignore common lines from coverage.
  This feature is now seems to be on by default.

* Adding `disable_search` because we do not need for the codecov action
  to search for coverage files: we explicitly provide files.

Signed-off-by: Mikalai Radchuk <mradchuk@redhat.com>

.github/workflows/unit.yaml

@@ -20,6 +20,6 @@ jobs:
 
       - uses: codecov/codecov-action@v4
         with:
+          disable_search: true
           files: cover.out
-          functionalities: fixes
           token: ${{ secrets.CODECOV_TOKEN }}