Remove conan_package_reference field and use package_reference.reference instead

app/graphql/types/packages/conan/file_metadatum_type.rb

app/models/packages/conan/file_metadatum.rb

app/models/packages/conan/package_reference.rb

app/models/packages/package_file.rb

app/presenters/packages/conan/package_presenter.rb

app/services/packages/conan/create_package_file_service.rb

ee/spec/requests/api/conan/v1/project_packages_spec.rb

spec/factories/packages/conan/file_metadata.rb

spec/finders/packages/conan/package_file_finder_spec.rb

spec/models/packages/conan/file_metadatum_spec.rb

spec/models/packages/conan/package_reference_spec.rb

spec/models/packages/package_file_spec.rb

spec/requests/api/conan/v1/instance_packages_spec.rb

spec/requests/api/conan/v1/project_packages_spec.rb

spec/requests/api/graphql/packages/conan_spec.rb

...rvices/packages/conan/create_package_file_service_spec.rb