[rocBLAS] Fix issues with rocBLAS 4.0.0

[nilsfriess]

Description

rocBLAS 4.0.0 removed support for the legacy BLAS inplace trmm, so calls to trmm cause a compilation error. The old functionality is provided by just duplicating the last two arguments of trmm (see also here).

To fix this, I am defining a macro ROCBLAS_NO_LEGACY_TRMM depending on the rocBLAS version which is then used in an #ifdef to decide which version of the function to call.

I also had to change slightly the way the path to librocblas.so is constructed in FindrocBLAS.cmake. I'm not sure if this is also related to the rocBLAS version or if this is a general issue on some systems, so I can also put that in a separated PR if you prefer.

Checklist

All Submissions

• [ ] Do all unit tests pass locally? Attach a log. I don't have an AMD gpu to test, I'm just assessing the state of compiling oneMKL with AdaptiveCpp to see if #307 needs any updates and can the maybe be merged.
• [x] Have you formatted the code using clang-format?