Drop the `fingerprint` column from `sbom_sources`

Why are we doing this work

We recently determined that the fingerprint column on sbom_sources is unnecessary (#369915 (comment 1082969858)). The column was ignored in %15.5 with !97989 (merged). Per the process for removing a column the next step is to drop it from the table in %15.6.

Relevant links

Non-functional requirements

• Documentation:
• Feature flag:
• Performance:
• Testing:

Implementation plan

Write a schema migration to remove the fingerprint column from sbom_sources.