Fix Rspec/Be violations

.rubocop_todo/rspec/be.yml

ee/spec/services/groups/transfer_service_spec.rb

...lib/bulk_imports/common/pipelines/boards_pipeline_spec.rb

...ackground_migration/backfill_snippet_repositories_spec.rb

spec/lib/gitlab/lets_encrypt/client_spec.rb

spec/lib/gitlab/search_context/builder_spec.rb

spec/models/concerns/issuable_spec.rb

spec/models/identity_spec.rb

spec/models/snippet_repository_spec.rb

spec/requests/api/graphql/mutations/snippets/create_spec.rb

spec/requests/api/pages_domains_spec.rb

spec/services/pages/delete_service_spec.rb

...ervices/pages/migrate_from_legacy_storage_service_spec.rb

spec/services/projects/update_pages_service_spec.rb

.../shared_examples/requests/api/packages_shared_examples.rb

spec/uploaders/file_uploader_spec.rb

spec/uploaders/namespace_file_uploader_spec.rb