[matrix] add tests for various matrix frontend features

[farzonl]

fixes #457
fixes #458
fixes #459

[farzonl]

On failure is in the Warp setup cmake action for arm64. The failure is not related to this pr.

-- Fetching WARP Latest Known Good for arm64 (1.0.15)...
CMake Error: tar: *dll: Not found in archive
CMake Error: tar: *pdb: Not found in archive
CMake Error at C:/Users/github/dev/_work/offload-test-suite/offload-test-suite/OffloadTest/cmake/modules/Warp.cmake:45 (file):
  file failed to extract:
  C:/Users/github/dev/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/Microsoft.Direct3D.WARP.1.0.15.zip

[spall]

lgtm

[hekota]

LGMT - just a few nits and a suggestion to use ZeroInitSize for initialization and Results: for checking expected output. I've only put comments in the first file, but it applies to all.