Add venv activate to coverage runs.

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Author: anirbanr-fb-r2p

.github/workflows/package_tests.yaml

@@ -93,7 +93,8 @@ jobs:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         run: |
           set -eux
+          source ~/venvs/multipy/bin/activate
           coverage report -m
           coverage xml
-
           codecov
+          deactivate