PR #12436: [XLA:CPU][oneDNN] Enable Matmul + BiasAdd + Elu / Tanh / Relu6 fusions for onednn
PR #12436: [XLA:CPU][oneDNN] Enable Matmul + BiasAdd + Elu / Tanh / Relu6 fusions for onednn

Imported from GitHub PR https://github.com/openxla/xla/pull/12436

This PR enables MatMul  fusions with different activations viz. Elu, Tanh and Relu6.
Copybara import of the project:

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9895b022aa66ee0f1040d0f6e557382c9dd77b99 by Gauri1 Deshpande <gauri1.deshpande@intel.com>:

Enable Matmul + BiasAdd + Elu / Tanh / Relu6 fusions for onednn

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c277c70da3a1bbe05d0d637ec2d4e9ce220f7f3f by Gauri1 Deshpande <gauri1.deshpande@intel.com>:

address review comments - sort name, remove default layout and remove default attributes

Merging this change closes #12436

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/12436 from Intel-tensorflow:gaurides/mm_activations c277c70da3a1bbe05d0d637ec2d4e9ce220f7f3f
