Use psycopg2 instead of psycopg2-binary.

[Ayrx]

This PR changes DefectDojo to use the psycopg2 package instead of psycopg2-binary.

This fixes a problem with running DefectDojo on aarch64 machines, with the main motivation here being able to do dev work on an Apple Silicon Macbook.

The psycopg2 package also recommends build from source instead of relying on the binary package.

The binary package is a practical choice for development and testing but in production it is advised to use the package built from sources.