Add storage consideration

What does this MR do?

This extends a definition of done to consider the storage expectations:

• temporary storage is not unlimited,
• each work item needs to use as small of space as possible,
• each work item should prefer system-provided temporary storage,
• all features dealing with files needs to support object storage with workhorse acceleration

This is added in a response of our effort working on Kubernetes deployment of GitLab.

I picked numbers that felt to me reasonable, but not that much limiting.

Is this a good direction?

Does this MR meet the acceptance criteria?

Conformity

• Documentation (if required)

Resolves #35641 (closed)