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feat(pytorch): Allow TransformerLayer and MultiheadAttention to accept sequence length parameters (#1066)

* Added ability for seqlen for transformer and mha layer
Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>

* Documentation for new parameters
Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>

* Add tests for THD layout, assert for THD layout with KV-Cache
Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>

* Fixed tests
Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



* Move THD logic in shape calculation, add missing optional in params
Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>

* Skip the THD test on GPUs older than Ampere
Signed-off-by: Przemek Tredak <ptredak@nvidia.com>

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Signed-off-by: Lukasz Pierscieniewski <lukaszp@nvidia.com>
Signed-off-by: Przemek Tredak <ptredak@nvidia.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>
Co-authored-by: Przemek Tredak <ptredak@nvidia.com>