Hipblas-lt integration: the Tensorflow part
This is a remaining part of hipblas-lt integration: diffs are taken from the original pull request: https://github.com/ROCmSoftwarePlatform/tensorflow-upstream/pull/2000/

The XLA part was already integrated in: https://github.com/openxla/xla/pull/3953/files#

Please ignore this PR: it erroneously tracks all the commit history from ROCm, 
another one will be created