feat: get migrations info REST-API added [FC-0112]

[ChrisChV]

Description

• Adds the get migrations info REST-API.
• Add missing title to CourseDetails population.
• Which edX user roles will this change impact? "Course Author", "Developer"

Supporting information

• Github issue: Import from Course stepper UI frontend-app-authoring#2524
• Internal ticket: FAL-4266
• Used in: feat: import course in library stepper [FC-0112] frontend-app-authoring#2567

Testing instructions

Follow the testing instructions in openedx/frontend-app-authoring#2567

Deadline

None

Other information

N/A

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