Fix backward compatibility for older blocks' required text response

Description

Older Ora2 blocks that required text responses but had optional file uploads would lose the required text response field because its checking `file_upload_response` instead of `file_upload_response_raw`

Won't Do

Assignee

Alexander Dusenbery

Reporter

Open Source Pull Request Bot

Contributor Name

Kevin Luo

Repo

edx/edx-ora2

Customer

Epic Link

None

OSCM Assignee

None

Platform Map Area (Levels 1 & 2)

Educator Experiences - Content Blocks & interactives

Platform Map Area (Levels 3 & 4)

Core Course Content Blocks - Open Response Assessments

Blended Hour Utilization Percentage

None

edX Theme

None

edX Squad

None

Github Lines Added

1

Github Lines Deleted

1

Priority

Unset