Data migration: root relative images are broken

[pdpinch]

For example, https://github.mit.edu/ocw-content-rc/2.007-spring-2009/blame/main/content/pages/projects/_index.md#L12 should be converted to an embedded resource.

legacy: https://ocw.mit.edu/courses/mechanical-engineering/2-007-design-and-manufacturing-i-spring-2009/projects/
nextgen: https://ocwnext.odl.mit.edu/courses/2-007-design-and-manufacturing-i-spring-2009/pages/projects/

[pdpinch]

I'm not sure how widespread this issue is. I'm guessing it was caused by the original OCW author not using resolveuid links properly.

[pdpinch]

Here's another one: https://github.mit.edu/ocw-content-rc/2.627-fall-2013/blame/main/content/pages/syllabus.md#L41

[ChristopherChudzicki]

Closing this in favor of #1233