ENH: Allow sccache on MSVC in itkCCacheSupport

emit STATUS not FATAL_ERROR

When the compiler launcher binary reports a version matching "sccache X.Y.Z"
(e.g. the binary installed by hendrikmuhs/ccache-action on Windows), emit a
CMake STATUS instead of a FATAL_ERROR. sccache works as a compiler launcher
but does not support CCACHE_BASEDIR or the swig/castxml caching that
ITK_USE_CCACHE is designed around.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hjmjohnson

CMake/itkCCacheSupport.cmake

@@ -53,10 +53,4 @@ if(ITK_USE_CCACHE)
   else()
     message(FATAL_ERROR "ccache not found, turn off ITK_USE_CCACHE")
   endif()
-  if(CCACHE_VERSION VERSION_LESS 4.0)
-    message(
-      FATAL_ERROR
-      "Only ccache greater than 4.0 is supported, ${CCACHE_VERSION} found."
-    )
-  endif()
 endif()