Can't install llama-cpp-python with HIPBLAS/ROCm on Windows

I have a RX 6900XT GPU, and after installing ROCm 5.7 I followed the instructions to install llama-cpp-python with HIPBLAS=on, but got the error of "Building wheel for llama-cpp-python (pyproject.toml) did not run successfully".

Full error log: [llama-cpp-python-hipblas-error.txt](https://github.com/abetlen/llama-cpp-python/files/15449465/llama-cpp-python-hipblas-error.txt)

As with the previously closed but unaddressed #1009, my debugging efforts have led me to believe that the wrong C and C++ compilers are being chosen for the cmake build:

1. MSVC is selected instead of clang

```cmake
-- Building for: Visual Studio 17 2022
-- Selecting Windows SDK version 10.0.22621.0 to target Windows 10.0.19045.
-- The C compiler identification is MSVC 19.39.33523.0
-- The CXX compiler identification is MSVC 19.39.33523.0
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe - works
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2022/Community/VC/Tools/MSVC/14.39.33519/bin/Hostx64/x64/cl.exe - works
-- Detecting CXX compile features
-- Detecting CXX compile features - done
```

2. A [clang-only option](https://clang.llvm.org/docs/ClangCommandLineReference.html) ('-x') is then ignored during compilation
```cmake
ClCompile:
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.39.33519\bin\HostX64\x64\CL.exe /c /I"C:\Users\mbamg\AppData\Local\Temp\pip-install-ps72vnaz\llama-cpp-python_1bb2b9676f39468bba7efbe70e3a1f33\vendor\llama.cpp\." /nologo /W1 /WX- /diagnostics:column /O2 /Ob2 /D _MBCS /D WIN32 /D _WINDOWS /D NDEBUG /D GGML_SCHED_MAX_COPIES=4 /D GGML_USE_LLAMAFILE /D GGML_USE_HIPBLAS /D GGML_USE_CUDA /D GGML_CUDA_DMMV_X=32 /D GGML_CUDA_MMV_Y=1 /D K_QUANTS_PER_ITERATION=2 /D _CRT_SECURE_NO_WARNINGS /D _XOPEN_SOURCE=600 /D __HIP_PLATFORM_HCC__=1 /D __HIP_PLATFORM_AMD__=1 /D "CMAKE_INTDIR=\"Release\"" /Gm- /EHsc /MD /GS /arch:AVX2 /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /std:c11 /Fo"ggml.dir\Release\\" /Fd"ggml.dir\Release\ggml.pdb" /external:W0 /Gd /TC /errorReport:queue /external:I "C:/Program Files/AMD/ROCm/5.7/include" -x hip "C:\Users\mbamg\AppData\Local\Temp\pip-install-ps72vnaz\llama-cpp-python_1bb2b9676f39468bba7efbe70e3a1f33\vendor\llama.cpp\ggml.c" "C:\Users\mbamg\AppData\Local\Temp\pip-install-ps72vnaz\llama-cpp-python_1bb2b9676f39468bba7efbe70e3a1f33\vendor\llama.cpp\ggml-alloc.c" "C:\Users\mbamg\AppData\Local\Temp\pip-install-ps72vnaz\llama-cpp-python_1bb2b9676f39468bba7efbe70e3a1f33\vendor\llama.cpp\ggml-backend.c" "C:\Users\mbamg\AppData\Local\Temp\pip-install-ps72vnaz\llama-cpp-python_1bb2b9676f39468bba7efbe70e3a1f33\vendor\llama.cpp\ggml-quants.c"
cl : command line warning D9002: ignoring unknown option '-x' [C:\Users\mbamg\AppData\Local\Temp\tmpd9u_s_jt\build\vendor\llama.cpp\ggml.vcxproj]
```

3. The subsequent argument ('hip') is interpreted as a non-existent source file
```cmake
/hip(1,1): error C1083: Cannot open source file: 'hip': No such file or directory [C:\Users\mbamg\AppData\Local\Temp\tmpd9u_s_jt\build\vendor\llama.cpp\ggml.vcxproj]
(compiling source file '/hip')
```
4. The build fails
```cmake
"C:\Users\mbamg\AppData\Local\Temp\tmpd9u_s_jt\build\ALL_BUILD.vcxproj" (default target) (1) ->
"C:\Users\mbamg\AppData\Local\Temp\tmpd9u_s_jt\build\vendor\llama.cpp\ggml.vcxproj" (default target) (4) ->
(ClCompile target) ->
/hip(1,1): error C1083: Cannot open source file: 'hip': No such file or directory [C:\Users\mbamg\AppData\Local\Temp\tmpd9u_s_jt\build\vendor\llama.cpp\ggml.vcxproj]

1 Warning(s)
1 Error(s)

Time Elapsed 00:00:02.54


*** CMake build failed
```

As with the original reporter, I've also tried setting CMake environment variables to force Clang compilation, with no change in result:

`[Environment]::SetEnvironmentVariable('CMAKE_ARGS', "-DLLAMA_HIPBLAS=on -DCMAKE_CXX_COMPILER='C:/Program Files/AMD/ROCm/5.7/bin/clang++.exe' -DCMAKE_C_ABI_COMPILED=FALSE -DCMAKE_CXX_ABI_COMPILED=FALSE -DCMAKE_CXX_STANDARD=17 -DCMAKE_CXX_STANDARD_REQUIRED=ON -DCMAKE_CXX_EXTENSIONS=OFF")`

`[Environment]::SetEnvironmentVariable('CMAKE_ARGS', "-DLLAMA_HIPBLAS=on -DCXX='C:/Program Files/AMD/ROCm/5.7/bin/clang++.exe' -DCMAKE_C_ABI_COMPILED=FALSE -DCMAKE_CXX_ABI_COMPILED=FALSE -DCMAKE_CXX_STANDARD=17 -DCMAKE_CXX_STANDARD_REQUIRED=ON -DCMAKE_CXX_EXTENSIONS=OFF")`

PS: Reading through #40 it's rather concerning that MSVC might be needed for Windows compilation. Is this still the case?