Enforce passing of database trigger feature flag for Vulnerability Read Creation

What does this MR do and why?

Enforce passing of database trigger feature flag for Vulnerability Read Creation

In the interest of easier reviewability, this MR takes the responsibility of enforcing that the database trigger for vulnerability_reads creation from !199517 (merged) so that that one can focus on the new vulnerability read upsert service in isolation.

This MR ensures that we're safely passing the FF to the DB trigger everywhere applicable by causing tests to fail if the flag is not found in the transaction config of classes applicable to the creation of Vulnerability Reads.

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