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/picker-column/picker-column.tsx

@@ -349,6 +349,7 @@ export class PickerColumnCmp implements ComponentInterface {
   hostData() {
     return {
       class: {
+        [`${this.mode}`]: true,
         'picker-col': true,
         'picker-opts-left': this.col.align === 'left',
         'picker-opts-right': this.col.align === 'right'