model uploads should not be resetting the incomplete flag in between phases

[carmenfan]

Description

currently, after each stage of processing, we reset the incomplete flag.

This causes a situation where if the process timeout/crash in a specific timing, the revision will look like it has been processed successfully.

We should stop resetting the flag in between to ensure this doesn't happen

Steps to replicate

• upload a model
• force the process to exit in between process

Current Behaviour

• it will return failure, but the user will be able to see a revision uploaded in the revision API

Expected Behaviour

• the user should not be able to see the revision as a valid revision