use javascript scripts instead of inline shell code in Github Workflows

[shazron]

https://github.com/adobe/aio-e2e-tests/blob/master/.github/workflows/app-smoke-test.yml

This will be easier to debug, and better structured tests can be run.

[aiojbot]

JIRA issue created: https://jira.corp.adobe.com/browse/ACNA-3996