* Use a non-root user in Node interop docker images
* Make node interop scripts without being root
* Update cwd in Node interop tests
* Update cwd in other Node interop tests
* Update cwd in Node interop tests relative to hardcoded path
* Fix updated Node interop test cwd
* Make service account file location more generic
* Use service account creds directly from mounted directory
* Fixing source path is recursive local submodule clone.
* Move creds file to /root, make /root accessible
Co-authored-by: Nicolas "Pixel" Noble <pixel@nobis-crew.org>