This PR
- adds an example on how to run Ray Train and log results to weights & biases
- adds functionality to the W&B plugin to store checkpoints
- fixes a bug introduced in #24017
- Adds a CI utility script to setup credentials
- Adds a CI utility script to remove test state from external services cc @simon-mo
Ray SGD v1 has been denoted as a deprecated API for a while. This PR fully deprecates Ray SGD v1. An error will be raised if ray.util.sgd package is attempted to be imported.
Closes#16435
Clean up the ci/ directory. This means getting rid of the travis/ path completely and moving the files into sensible subdirectories.
Details:
- Moves everything under ci/travis into subdirectories, e.g. ci/build, ci/lint, etc.
- Minor adjustments to some scripts (variable renames)
- Removes the outdated (unused) asan tests