Proposed Changes

This PR includes the following:

1) Refactor

• Moved helpers from GradeEntryFormsHelper into GradeEntryFormsController, which is the more appropriate and conventional location for this behavior.
• Deleted the file containing GradeEntryFormsHelper

2) Tests

• Added controller tests to increase coverage of update_grade_entry_form_params helper (now located in GradeEntryFormsController class).
• New tests verify:
  • Grade entry items with empty name and out_of fields are deleted during update.
  • Remaining items are assigned sequential position values after deletion, ensuring ordering logic is correct.

See new coverage report:

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