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* Compute amax in activation kernels when the output pointer is provided, even for non-fp8 outputs
Signed-off-by: Jan Bielak <jbielak@nvidia.com>
(cherry picked from commit 9f13fe2fefc58cae93bc467d87d01ecf792a0381)

* Initialize metatensor values
Signed-off-by: Jan Bielak <jbielak@nvidia.com>

* Fuse computation of amax into the activation kernel for fp8 current scaling
Signed-off-by: Jan Bielak <jbielak@nvidia.com>
(cherry picked from commit 2b54327ac9c931a5340983a79e99de5caa0399dd)
Signed-off-by: Jan Bielak <jbielak@nvidia.com>

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

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* Zero out amax in `create_hp_tensor_with_amax` instead of relying on `Float8CurrentScalingQuantizer.__init__` to zero-initialize it
Signed-off-by: Jan Bielak <jbielak@nvidia.com>

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

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Signed-off-by: Jan Bielak <jbielak@nvidia.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>