[ML] Migrate tests using enzyme to use @testing-library/react.

[walterra]

At the moment it looks like to be able to migrate to React 18, we need to migrate tests using enzyme to @testing-library/react, since Enzyme officially supporting React 18 looks still unlikely (see e.g. enzymejs/enzyme#2524, https://dev.to/wojtekmaj/enzyme-is-dead-now-what-ekl). When porting these tests, we should also try to avoid the use of existing snapshots again and refactor to more useful tests that assert rendered content and act on the components so we rely less on implementation details. And since we write new tests with @testing-library/react only anyway, we should aim to migrate these tests so we rely on one framework only eventually.

plugins/ml

• x-pack/plugins/ml/public/application/components/controls/select_interval/select_interval.test.tsx
  [ML] Migrate SelectInterval/SelectSeverity unit tests from enzyme to react-testing-lib #153321
• x-pack/plugins/ml/public/application/components/controls/select_severity/select_severity.test.tsx
  [ML] Migrate SelectInterval/SelectSeverity unit tests from enzyme to react-testing-lib #153321
• x-pack/plugins/ml/public/application/components/job_selector/timerange_bar/timerange_bar.test.js
• x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_exploration/components/outlier_exploration/outlier_exploration.test.tsx
• x-pack/plugins/ml/public/application/data_frame_analytics/pages/analytics_management/components/create_analytics_button/create_analytics_button.test.tsx
• x-pack/plugins/ml/public/application/explorer/components/explorer_no_influencers_found/explorer_no_influencers_found.test.js
• x-pack/plugins/ml/public/application/explorer/components/explorer_no_results_found/explorer_no_results_found.test.js
• x-pack/plugins/ml/public/application/explorer/explorer_charts/explorer_charts_container.test.js
• x-pack/plugins/ml/public/application/explorer/explorer_charts/components/explorer_chart_label/explorer_chart_label_badge.test.js
• x-pack/plugins/ml/public/application/explorer/explorer_charts/components/explorer_chart_label/explorer_chart_label.test.js
• x-pack/plugins/ml/public/application/jobs/components/custom_url_editor/editor.test.tsx
  • removed snapshot tests in [ML] Data Frame Analytics/Anomaly Detection: Custom URLs - entity dropdown reflects Data View update #155096, will need to be reintroduced as tests based on react-testing-lib that don't assert implementation details.
• x-pack/plugins/ml/public/application/jobs/components/custom_url_editor/list.test.tsx
• x-pack/plugins/ml/public/application/settings/filter_lists/components/filter_list_usage_popover/filter_list_usage_popover.test.js

plugins/transform

• x-pack/plugins/transform/public/app/sections/create_transform/components/aggregation_list/agg_label_form.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/aggregation_list/list_form.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/aggregation_list/list_summary.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/aggregation_list/popover_form.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/group_by_list/group_by_label_form.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/group_by_list/group_by_label_summary.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/group_by_list/list_form.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/group_by_list/list_summary.test.tsx
• x-pack/plugins/transform/public/app/sections/create_transform/components/group_by_list/popover_form.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/transform_management_section.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/action_delete/delete_action_name.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/action_start/start_action_name.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/action_stop/stop_action_name.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/create_transform_button/create_transform_button.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/transform_list/expanded_row_details_pane.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/transform_list/expanded_row_json_pane.test.tsx
• x-pack/plugins/transform/public/app/sections/transform_management/components/transform_list/expanded_row_json_pane.test.tsx

[elasticmachine]

Pinging @elastic/ml-ui (:ml)