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* Return dummy wgrad tensors when requested by Mcore
Signed-off-by: Tim Moon <tmoon@nvidia.com>

* Apply suggestions from code review
Co-authored-by: Jan Bielak <janekb04@icloud.com>
Signed-off-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>

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Signed-off-by: Tim Moon <tmoon@nvidia.com>
Signed-off-by: Tim Moon <4406448+timmoon10@users.noreply.github.com>
Co-authored-by: Jan Bielak <janekb04@icloud.com>