Rename all_npq_courses in funding_eligibility

The previous name (all_npq_courses) initially reads as checking all possible NPQ courses which would be wrong. Changing the name to this makes it clearer what is being checked.

app/services/npq/funding_eligibility.rb

@@ -22,7 +22,7 @@ def npq_course
       @npq_course ||= NPQCourse.find_by!(identifier: npq_course_identifier)
     end
 
-    def all_npq_courses
+    def npq_course_and_rebranded_alternatives
       npq_course.rebranded_alternative_courses
     end
 
@@ -38,7 +38,7 @@ def accepted_applications
       @accepted_applications ||= begin
         application_ids = users.flat_map do |user|
           user.npq_applications
-              .where(npq_course: all_npq_courses)
+              .where(npq_course: npq_course_and_rebranded_alternatives)
               .where(eligible_for_funding: true)
               .accepted
               .pluck(:id)