[BE] Fix specs once we switch to sbom_graph_paths table for queries

We had to skip a few N+1 query tests, due to our existing dependency paths query fetching. We need to un-skip them once we switch to sbom_graph_paths table for queries.

MR which skipped the specs - !184985 (diffs)

Specs to unskip -

• https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/spec/requests/explore/dependencies_controller_spec.rb#L113
• https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/spec/requests/projects/dependencies_controller_spec.rb#L72
• https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/spec/services/sbom/exporters/csv_service_spec.rb#L114
• https://gitlab.com/gitlab-org/gitlab/-/blob/master/ee/spec/services/sbom/exporters/json_array_service_spec.rb#L144