MKL DNN 1.0 integration - refactoring MKL conv forward op

[nammbash]

This PR is intended to refactor the current implementation of forward conv ops with MKL-DNN
v1.0 integration:
(1) Abstract macro definitions from individual source files to a common header file (mkl_types)
for better code reuse (in coming PR's)
(2) Refactor based on Google coding style. For instance, replace CHECK_NOTNULL to DCHECK.

Background:
We (Intel) will submit a sequence of PR's with MKL-DNN v1.0 integration (around 24 MKL ops).
And this PR will be fundamental for the near future PR's.

Reference of previously merged PR:
#30549

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