convert : add split() to LoraTorchTensor in LoRA converter (#22832)
* convert : add split() method to LoraTorchTensor
* Fix python type-check
* Fix flake8 Lint
* fix: handle positional dim arg in torch.split dispatch
* Fix type-check again
* Fix type-checks
* Remove unit test per reviewers feedback
* work around ty deficiency
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Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>