Fix output directory on Windows with non-VS generators

On Windows when configuring CMake with the Ninja generator and
`-DUMF_BUILD_SHARED_LIBRARY=ON` the `umf.dll` is output to the
`${CMAKE_BINARY_DIR}/bin/$<CONFIG>` directory, this is
problematic as it breaks tools like `urinfo.exe` and `sycl-ls.exe` in
development builds as they rely on `umf.dll` residing in the same
directory in order to be loaded.

This behavior is desirable when using Visual Studio generators, however.
Therefore, this patch changes the logic to check if `CMAKE_GENERATOR`
matches the `"Visual Studio"` string before appending `$<CONFIG>` to the
output directory.

Author: kbenzie

CMakeLists.txt

@@ -268,17 +268,11 @@ endforeach()
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_UMF_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-if(MSVC)
+if(CMAKE_GENERATOR MATCHES "Visual Studio" OR CMAKE_GENERATOR MATCHES
+                                              "Ninja Multi-Config")
     set(CMAKE_UMF_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin/$<CONFIG>)
 endif()
 
-# Define a path for custom commands to work around MSVC
-set(CUSTOM_COMMAND_BINARY_DIR ${CMAKE_UMF_OUTPUT_DIRECTORY})
-if(MSVC)
-    # MSVC implicitly adds $<CONFIG> to the output path
-    set(CUSTOM_COMMAND_BINARY_DIR ${CUSTOM_COMMAND_BINARY_DIR}/$<CONFIG>)
-endif()
-
 # Sanitizer flags
 if(UMF_USE_ASAN)
     add_sanitizer_flag(address)