Extract static DATA_KEY & EVENT_KEY to base-component (#33635)

* Force each plugin that extends base-components to implement a static method `NAME()`
* Remove redundant `NAME` argument from 'Utils.defineJQueryPlugin' & fix test

js/src/popover.js

@@ -76,18 +76,10 @@ class Popover extends Tooltip {
     return NAME
   }
 
-  static get DATA_KEY() {
-    return DATA_KEY
-  }
-
   static get Event() {
     return Event
   }
 
-  static get EVENT_KEY() {
-    return EVENT_KEY
-  }
-
   static get DefaultType() {
     return DefaultType
   }
@@ -166,6 +158,6 @@ class Popover extends Tooltip {
  * add .Popover to jQuery only if jQuery is present
  */
 
-defineJQueryPlugin(NAME, Popover)
+defineJQueryPlugin(Popover)
 
 export default Popover