Add vulnerabilities column to sbom_occurrences

What does this MR do and why?

Related issue: #426121 (closed)

Add vulnerabilities column to sbom_occurrences table.

This PoC MR can provide some context into this change.

EE: true Changelog: added

DB migrate

bundle exec rails db:migrate:redo:main VERSION=20230915100513
main: == [advisory_lock_connection] object_id: 226960, pg_backend_pid: 83873
main: == 20230915100513 AddVulnerabilitiesToSbomOccurrences: reverting ==============
main: -- remove_column(:sbom_occurrences, :vulnerabilities, :jsonb, {:default=>[]})
main:    -> 0.0033s
main: == 20230915100513 AddVulnerabilitiesToSbomOccurrences: reverted (0.0088s) =====

main: == [advisory_lock_connection] object_id: 226960, pg_backend_pid: 83873
main: == [advisory_lock_connection] object_id: 227760, pg_backend_pid: 84130
main: == 20230915100513 AddVulnerabilitiesToSbomOccurrences: migrating ==============
main: -- add_column(:sbom_occurrences, :vulnerabilities, :jsonb, {:default=>[]})
main:    -> 0.0042s
main: == 20230915100513 AddVulnerabilitiesToSbomOccurrences: migrated (0.0075s) =====

main: == [advisory_lock_connection] object_id: 227760, pg_backend_pid: 84130

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