BUG: Add google.cloud.workflows to the requirements.txt file

### Description

Details of the bug:
ModuleNotFoundError: No module named 'google.cloud.workflows'

### When do you see the bug

Issue is happening when using the new image for deploying the App Engine

### Version

None

### Priority

priority:1

### What database engine are you seeing the problem on?

All

### Relevant log output

_No response_