BUG: Fix mapping of module name to group

Fix parsing of itk-module.cmake file to account for change introduced
in InsightSoftwareConsortium/ITK@efa749515 (STYLE: Initial run of
cmake-format) by implementing change similar to
InsightSoftwareConsortium/ITK@6384cd067 (BUG: Fix ITKGroup identification with multiline itk_module)

Author: jcfr

CMakeLists.txt

@@ -439,10 +439,9 @@ else()
     foreach(group IN LISTS ITK_GROUPS)
       file( GLOB_RECURSE _${group}_module_files ${ITK_SOURCE_DIR}/Modules/${group}/itk-module.cmake )
       foreach( _module_file ${_${group}_module_files} )
-        file( STRINGS ${_module_file} _module_line REGEX "itk_module[ \n]*\\([ \n]*[A-Za-z0-9]*" )
-        string( REGEX MATCH "(\\([ \n]*)([A-Za-z0-9]*)" _module_name ${_module_line} )
-        set( _module_name ${CMAKE_MATCH_2} )
-        set( _${_module_name}_module_line ${_module_line} )
+        file(READ ${_module_file} _module_file_content)
+        string( REGEX MATCH "itk_module[ \n]*(\\([ \n]*)([A-Za-z0-9]*)" _module_name ${_module_file_content} )
+        set(_module_name ${CMAKE_MATCH_2})
         list( APPEND _${group}_module_list ${_module_name} )
         set(ITK_MODULE_${_module_name}_GROUP ${group})
       endforeach()