Use ApplicationWorkHistoryBreak#breakable column

[CatalinVoineag]

Context

We migrated all the data in ba80a6f

Now we can use the breakable columns to link to an application_form

Changes proposed in this pull request

Use the breakable column

Guidance to review

Create a work break on review or locally

Peek.2024-08-20.14-24.mp4

Things to check

• If the code removes any existing feature flags, a data migration has also been added to delete the entry from the database
• This code does not rely on migrations in the same Pull Request
• If this code includes a migration adding or changing columns, it also backfills existing records for consistency
• If this code adds a column to the DB, decide whether it needs to be in analytics yml file or analytics blocklist
• API release notes have been updated if necessary
• If it adds a significant user-facing change, is it documented in the CHANGELOG?
• Required environment variables have been updated added to the Azure KeyVault
• Inform data insights team due to database changes
• Make sure all information from the Trello card is in here
• Rebased main
• Cleaned commit history
• Tested by running locally
• Add PR link to Trello card

[CatalinVoineag]

This is tested by our specs already, lots of them will fail if this is not here

[inulty-dfe]

Add property to Provider to determine if they use school placements or not