temp push
temp push
function achieved, need to fix test
[Fixes #72936492] Admin can send join link to new instructors
[Fixes #72936492]

1. adjust position for sendNewInstructorJoinLink function in logic
2. remove commented code
move verify method into instructors logic
fix the adminInsrtuctorAccountAddAction's verifying method
Show an error message to user and continue saving other question responses, instead of Assumption.fail
Merge branch 'master' into 73684624
[Fixes #73684624] remerging - Error when submitting feedback response
Merge branch 'master' into 72936492
[Fixes #72936492] Admin can send join link to new instructors
modify error message
Changed join link in the email sent to new instructors
Merge branch '73684624' of https://github.com/TEAMMATES/repo into 73684624
Merge branch 'master' into 73684624
[Fixes #73684624] re-remerging - Error when submitting feedback response
Revert "Changed join link in the email sent to new instructors"

This reverts commit 93e068fe2c27fc5a0e86199e91d5748db1b5e44c.
Reverting to remove the first attempt of 'admin can send join link'
Reapplying a previous commit left out due to reverting