User transfer courses when generating pre-req errors (#613)

[yijen-sun]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Closes #613

Type of change

Please tick the boxes that best match your changes.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• This requires a run of yarn install
• This has migration changes and requires a run of yarn dev:migration:run

How Has This Been Tested?

Please describe how you tested this PR (both manually and with tests) Provide instructions so we can reproduce.

• Manually tested

Adding a course that requires a pre-req (ex: Interdisciplinary Advanced Writing in the Disciplines), and making sure the pre-req error disappears when adding the required course in Transfer Courses (ex: First Year Writing).

Transfer courses should not apply to co-reqs, only pre-reqs.

Checklist:

• I have run the production builds in docker for the frontend/backend and ensure things run fine. Check README of repo on how to run if not sure.
• I have performed a self-review of my own code
• I have commented my code where needed
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[dkd2101]

Everything makes sense to me! Tested it on my end with multiple different majors and everything seems to check out. Nice job!

[BrandonLim8890]

Was prettier run before the PR?