[romc6.4_internal_testing] avoid redundant NHWC-NCHW-NHWC conversions for MiopenBatchNormBackward

[dnikolaev-amd]

Pytorch called grad.contiguous() before miopen_batch_norm_backward. This led to redundant conversions from NHWC gradient to NCHW and back to NHWC.
Solution based on cudnn_batch_norm_backward description in the same derivatives.yaml file
Fixes SWDEV-520250

Before:

After:

[rocm-repo-management-api]

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