[People] Differentiate between SIS Import and Manual enrollments in People

[stevenwilliams]

As outlined in the Canvas Guides (https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-remove-an-enrollment-from-a-course/ta-p...), "If an enrollment is created via SIS, only admins can remove an enrollment from the course." This can create confusion for instructors in courses with both manual and SIS-created enrollments, where instructors have different abilities to manage a student's enrollment based on how it was created.

Because Canvas maintains an internal logic of whether an enrollment was created manually or via SIS import, this could also be represented to users in the People tool (using an icon or similar flag), to help instructors understand why particular enrollments can be managed in different ways.