(5/n) Support 2D Parallelism in Lightning Trainer (#19878)
* ModelParallelStrategy for Lightning Trainer
* mypy
* import fix
* fix torchscript errors
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
* fix docs issue
* fix test execution
* Update src/lightning/pytorch/strategies/model_parallel.py
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Luca Antiga <luca.antiga@gmail.com>