Win fixes for CMake library resolution

Author: WillAyd

cpp/cmake_modules/FindSnappyAlt.cmake

@@ -75,10 +75,6 @@ if(ARROW_SNAPPY_USE_SHARED)
        "${CMAKE_SHARED_LIBRARY_PREFIX}snappy${CMAKE_SHARED_LIBRARY_SUFFIX}")
 else()
   set(SNAPPY_STATIC_LIB_NAME_BASE "snappy")
-  if(MSVC)
-    set(SNAPPY_STATIC_LIB_NAME_BASE
-        "${SNAPPY_STATIC_LIB_NAME_BASE}${SNAPPY_MSVC_STATIC_LIB_SUFFIX}")
-  endif()
   set(SNAPPY_LIB_NAMES
       "${CMAKE_STATIC_LIBRARY_PREFIX}${SNAPPY_STATIC_LIB_NAME_BASE}${CMAKE_STATIC_LIBRARY_SUFFIX}"
   )

cpp/cmake_modules/Findutf8proc.cmake

@@ -73,9 +73,6 @@ if(ARROW_UTF8PROC_USE_SHARED)
   list(APPEND utf8proc_LIB_NAMES
        "${CMAKE_SHARED_LIBRARY_PREFIX}utf8proc${CMAKE_SHARED_LIBRARY_SUFFIX}")
 else()
-  if(MSVC AND NOT DEFINED utf8proc_MSVC_STATIC_LIB_SUFFIX)
-    set(utf8proc_MSVC_STATIC_LIB_SUFFIX "_static")
-  endif()
   set(utf8proc_STATIC_LIB_SUFFIX
       "${utf8proc_MSVC_STATIC_LIB_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")
   set(utf8proc_LIB_NAMES