in ExternalFunChecker.

This allows RemoveModifierFix to provide a quickfix to remove it.

ReplaceCallFix.

  1. NON_ABSTRACT_FUNCTION_WITH_NO_BODY
  2. ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS
  3. ABSTRACT_FUNCTION_IN_NON_ABSTRACT_CLASS

Also changed FE1.0 checker and all related fix factories to report error
on the declaration instead of the lateinit modifier. This is consistent
with the direction of all checkers in FIR (no reporting on modifiers).