feat: codecov setup

JIRA: TRIVIAL
risk: nonprod

Author: hkad98

.github/workflows/rw-python-tests.yaml

@@ -25,6 +25,7 @@ jobs:
         uses: codecov/codecov-action@v5
         with:
           files: ./packages/gooddata-sdk/coverage.xml,./packages/gooddata-pandas/coverage.xml,./packages/gooddata-fdw/coverage.xml,./packages/gooddata-flight-server/coverage.xml,./packages/gooddata-flexconnect/coverage.xml,./packages/gooddata-dbt/coverage.xml,./packages/gooddata-pipelines/coverage.xml
+          token: ${{ secrets.CODECOV_TOKEN }}
   lint-and-format-check:
     runs-on: ubuntu-latest
     if: ${{inputs.changed-python-modules == 'true'}}