[Assignments] Change wording to clarify functionality of Moderated Grading

[VPundir]

Problem statement:

All "graders" are called "Graders" in the case of "Moderated Grading", leading to confusion about the settings and therefore a large number of queries about it.

Proposed solution:

This can be solved simply by changing the wording in the Assignment > Moderated Grading settings: "Grader that determines final grade" should be changed to "Moderator". This not only clarifies the functionality, but is also in line with the name of the functionality.

User role(s):

instructor

[VPundir]

P.S. Similarly "Final grader can view other grader names" should be changed to "Moderator can view other grader names"