EuniceSim142

[#12048] Migrate FeedbackSessionOpeningRemindersAction

1

Part of #12048. Opening emails are sent to co-owner instructors, students and instructors of a course. (co-owners are sent 2 different emails)

[#12048] SQL injection test for FeedbackQuestionsDbIT

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Part of #12048. Test for SQL injections in FeedbackQuestions database methods. --- Tests not created for the following db methods as they do not accept string params (so they're type-checked...