Add additional gemm batch types

[AidanBeltonS]

Description

This adds new data types for the gemm_batch operation, to better be in line with the oneMKL spec. The types added are <half, half, float, float>, <int8, int8, float, float>, and <int8, int8, int32, float>.

New testing is added for these data types. Tests where the scalar type does not match the input type require a higher tolerance as the reference calculation is being performed at a much higher precision.

Test logs:
rocblas_test_log.txt
cublas_test_log.txt

I have been unable to test the mkl backends as I was running into some problems regarding duplicate definitions between the mkl headers and the openBlas/CBlas headers.

Fixes # (GitHub issue)
#446

Checklist

All Submissions

• Do all unit tests pass locally? Attach a log.
• [x]Have you formatted the code using clang-format?

New interfaces

• Have you provided motivation for adding a new feature as part of RFC and
  it was accepted? # (RFC)

New features

• Have you provided motivation for adding a new feature?
• Have you added relevant tests?

[AidanBeltonS]

Closing, accidentally used old branch of work