fix(components): include mode classes on components for use in shadow (#17838)

- removes mode-less component classes from the internal CSS, use element instead
- adds mode specific classes `md` or `ios` for styling inside of shadow components
- adds e2e test that verifies mode classes exist on all ionic components, plus checks for specific classes that the components need for internal styling

fixes #17608

core/src/components/refresher/refresher.tsx

@@ -1,7 +1,6 @@
 import { Component, ComponentInterface, Element, Event, EventEmitter, Method, Prop, QueueApi, State, Watch } from '@stencil/core';
 
 import { Gesture, GestureDetail, Mode, RefresherEventDetail } from '../../interface';
-import { createThemedClasses } from '../../utils/theme';
 
 @Component({
   tag: 'ion-refresher',
@@ -350,7 +349,10 @@ export class Refresher implements ComponentInterface {
     return {
       slot: 'fixed',
       class: {
-        ...createThemedClasses(this.mode, 'refresher'),
+        [`${this.mode}`]: true,
+
+        // Used internally for styling
+        [`refresher-${this.mode}`]: true,
 
         'refresher-active': this.state !== RefresherState.Inactive,
         'refresher-pulling': this.state === RefresherState.Pulling,