IPU Integration 5/5 (#7867)
* Initial changes
* Add broken example for now
* Fix reference
* Fix format
* Code runs
* Fixes
* Clear up files
* Add tests, helpers, fixes
* Small cleanups
* Refactors based on review
* Swap to special tests
* Add special tests
* Add source
* Cleanups
* Add logic to attach/detach model from devices
* Fixes for tests
* Fixes for tests
* Move earlier
* Cleanups
* Add check for nvcc
* Add tests, cleanups
* Fix errors
* fix
* Try condition
* Add missing annotation
* Clearer
* Clearer message
* Fix variable
* Cleanups
* Add comment
* CHANGELOG.md
* Add simple selection test
* Remove special=True to see what happens
* Fix test
* Update tests/accelerators/test_ipu.py
Co-authored-by: Kaushik B <45285388+kaushikb11@users.noreply.github.com>
* Convert ipu_cores -> ipus
* Add typing, fail earlier
* simplify precision
* Add test, add helper
* fix accum
* Update pytorch_lightning/plugins/training_type/ipu.py
Co-authored-by: thomas chaton <thomas@grid.ai>
* Use stages
* Make sure warning message returned
* thorw error
* Add more tests, use fs
* add comment
* Clean
* Address feedback, add IPU tests
* Fixes
* Fix signature
* Add types
* Remove autoround
* Add docstring
* ipu_cores -> ipus
* Add test, remove unnecessary precision set
* Add optimizer test
* Add precision back with test
* Address code review
* Change to probs
* Move some of the asserts earlier
Co-authored-by: Kaushik B <45285388+kaushikb11@users.noreply.github.com>
Co-authored-by: thomas chaton <thomas@grid.ai>
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