Migrate test plugins ⇒ NP

[lizozom]

• kbn_tp_custom_visualizations - creating custom visualizations in Kibana. Migrate test plugins ⇒ NP (kbn_tp_custom_visualizations) #61606
• kbn_tp_embeddable_explorer - functionally tested set of Embeddable API examples. Migrate test plugins ⇒ NP (kbn_tp_embeddable_explorer) #64756
• kbn_tp_sample_app_plugin - empty plugin application, old platform style
• kbn_tp_sample_panel_action - actions demo Migrate test plugins ⇒ NP (kbn_tp_sample_panel_action) #60749
• kbn_tp_top_nav - demo of registering custom menu items from a plugin Migrate test plugins ⇒ NP (kbn_tp_top_nav) #60092
• kbn_tp_run_pipeline Typescriptify and shim kbn_tp_run_pipeline test plugin #50645, Migrate test plugins ⇒ NP (kbn_tp_run_pipeline) #64780

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)