Clean unnecessary 'attachToDocument' in various specs in 'ee/spec/frontend'

Summary

As described in &2419 (closed), we need to clean up our Jest tests from unnecessary attachToDocument usage

Risks

No risks

Involved specs

• ee/spec/frontend/approvals/components/approval_check_popover_spec.js
• ee/spec/frontend/boards/issue_card_spec.js
• ee/spec/frontend/design_management/components/upload/button_spec.js
• ee/spec/frontend/feature_flags/components/configure_feature_flags_modal_spec.js
• ee/spec/frontend/ide/components/terminal_sync/terminal_sync_status_spec.js
• ee/spec/frontend/logs/components/environment_logs_spec.js
• ee/spec/frontend/logs/components/log_control_buttons_spec.js
• ee/spec/frontend/analytics/cycle_analytics/components/stage_event_list_spec.js
• ee/spec/frontend/analytics/cycle_analytics/components/stage_table_spec.js
• ee/spec/frontend/security_dashboard/components/filter_spec.js