Fix gaps in the abstract shell to concrete migration

Arran Walkerrequested to merge
ajwalker/concrete-fixes into main

What does this MR do?

Identifies and fixes several gaps in our abstract shell -> concrete migration.

Best reviewed a commit at a time.

Why was this MR needed?

For the FF_SCRIPTS_TO_STEPS migration work.

What are the relevant issue numbers?

Closes #39403 (closed)

Edited by Arran Walker

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