[xla:cpu] Add convolution benchmark
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[xla:cpu] Add convolution benchmark

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/13542 from Tixxx:tixxx/dce_control_dep 1de482f5a80f4e9a9b2c8203129111d2aaa63f28
