fix(cmake): Prevent overwriting of component properties in output file

While 'component_properties_text'
correctly accumulated properties from all processed components, each
iteration of the loop was overwriting the entire file content.

Move the file(WRITE ...) call outside the loop to ensure all accumulated
component properties are written once, preserving information for all
components.

tools/cmake/component.cmake

@@ -122,6 +122,7 @@ endfunction()
 # keeps a list of all its properties.
 #
 function(__component_write_properties output_file)
+    set(component_properties_text "")
     idf_build_get_property(component_targets __COMPONENT_TARGETS)
     foreach(component_target ${component_targets})
         __component_get_property(component_properties ${component_target} __COMPONENT_PROPERTIES)
@@ -130,8 +131,8 @@ function(__component_write_properties output_file)
             set(component_properties_text
                 "${component_properties_text}\nset(__component_${component_target}_${property} \"${val}\")")
         endforeach()
-        file(WRITE ${output_file} "${component_properties_text}")
     endforeach()
+    file(WRITE ${output_file} "${component_properties_text}")
 endfunction()
 
 #