Point to composer.callback.Generate (#631)
* Point to composer.callback.Generate
* small fixes
* Add builder test for generate callback
* " -> '
* doc formatting
* Add test, add deprecation warning
* call assert
* Update llmfoundry/callbacks/generate_callback.py
Co-authored-by: Daniel King <43149077+dakinggg@users.noreply.github.com>
* add key test
* use mpt_causal_lm
* Update llmfoundry/callbacks/generate_callback.py
Co-authored-by: Daniel King <43149077+dakinggg@users.noreply.github.com>
* test updates
* mock inside
* formatting
* fix style
---------
Co-authored-by: Daniel King <43149077+dakinggg@users.noreply.github.com>
