Style/RedundantFreeze: Fix offenses in EE

.rubocop_todo/style/redundant_freeze.yml

ee/app/finders/concerns/epics/findable.rb

ee/app/finders/ee/analytics/cycle_analytics/stage_finder.rb

ee/app/finders/epics_finder.rb

...hql/mutations/incident_management/oncall_rotation/base.rb

...es/incident_management/oncall_rotation_date_input_type.rb

ee/app/models/allowed_email_domain.rb

ee/app/models/ee/issue.rb

ee/app/models/ee/label.rb

ee/app/models/ee/project_import_state.rb

ee/app/models/ee/vulnerability.rb

ee/app/models/iteration.rb

ee/app/models/status_page/project_setting.rb

...alytics/cycle_analytics/value_stream_errors_serializer.rb

ee/app/services/elastic/data_migration_service.rb

...dent_management/issuable_resource_links/create_service.rb

ee/app/services/projects/restore_service.rb

ee/lib/ee/gitlab/path_regex.rb

ee/lib/ee/gitlab/web_hooks/rate_limiter.rb

ee/lib/elastic/latest/git_class_proxy.rb