chore(playwright): migrate themes to palettes (#29148)

Issue number: N/A

---------

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## What is the current behavior?
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## What is the new behavior?
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this PR. -->

- Migrates the test infrastructure to use `palettes` instead of `themes`

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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screenshots of how the component looks before and after the change. -->

This **does not** change where the light/dark/high contrast styles live
or how they are consumed in the test infra. That work is done here:
#29149

Co-authored-by: Liam DeBeasi <[email protected]>

Author: sean-perkins

core/src/components/action-sheet/test/a11y/action-sheet.e2e.ts

@@ -40,7 +40,7 @@ const testAriaButton = async (
   await expect(actionSheetButton).toHaveAttribute('aria-label', expectedAriaLabel);
 };
 
-configs({ directions: ['ltr'], themes: ['dark', 'light'] }).forEach(({ config, title }) => {
+configs({ directions: ['ltr'], palettes: ['dark', 'light'] }).forEach(({ config, title }) => {
   test.describe(title('action-sheet: Axe testing'), () => {
     test('should not have accessibility violations when header is defined', async ({ page }) => {
       await page.setContent(

core/src/components/alert/test/a11y/alert.e2e.ts

@@ -28,7 +28,7 @@ const testAria = async (
   expect(ariaDescribedBy).toBe(expectedAriaDescribedBy);
 };
 
-configs({ directions: ['ltr'], themes: ['dark', 'light'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['dark', 'light'] }).forEach(({ title, config }) => {
   test.describe(title('alert: Axe testing'), () => {
     test('should not have accessibility violations when header and message are defined', async ({ page }) => {
       await page.setContent(

core/src/components/alert/test/basic/alert.e2e.ts

@@ -100,7 +100,7 @@ configs().forEach(({ config, screenshot, title }) => {
   });
 });
 
-configs({ themes: ['light', 'dark'] }).forEach(({ config, screenshot, title }) => {
+configs({ palettes: ['light', 'dark'] }).forEach(({ config, screenshot, title }) => {
   test.describe(title('should not have visual regressions'), () => {
     test('more than two buttons', async ({ page }) => {
       await page.setContent(

core/src/components/back-button/test/a11y/back-button.e2e.ts

@@ -5,7 +5,7 @@ import { configs, test } from '@utils/test/playwright';
 /**
  * Only ios mode uses ion-color() for the back button
  */
-configs({ directions: ['ltr'], modes: ['ios'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], modes: ['ios'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('back-button: a11y for ion-color()'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.setContent(

core/src/components/badge/test/a11y/badge.e2e.ts

@@ -25,7 +25,7 @@ configs({ directions: ['ltr'] }).forEach(({ title, screenshot, config }) => {
   });
 });
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ config, title }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ config, title }) => {
   test.describe(title('badge: a11y'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       /**

core/src/components/button/test/a11y/button.e2e.ts

@@ -2,7 +2,7 @@ import AxeBuilder from '@axe-core/playwright';
 import { expect } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('button: a11y for ion-color()'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.setContent(
@@ -52,7 +52,7 @@ configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, co
 /**
  * Only ios mode uses ion-color() for the activated button state
  */
-configs({ directions: ['ltr'], modes: ['ios'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], modes: ['ios'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('button: ios contrast'), () => {
     test('activated state should not have accessibility violations', async ({ page }) => {
       await page.setContent(

core/src/components/checkbox/test/a11y/checkbox.e2e.ts

@@ -2,7 +2,7 @@ import AxeBuilder from '@axe-core/playwright';
 import { expect } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('checkbox: a11y'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.setContent(

core/src/components/fab-button/test/a11y/fab-button.e2e.ts

@@ -2,7 +2,7 @@ import AxeBuilder from '@axe-core/playwright';
 import { expect } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('fab-button: a11y'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.setContent(

core/src/components/input/test/a11y/input.e2e.ts

@@ -2,7 +2,7 @@ import AxeBuilder from '@axe-core/playwright';
 import { expect } from '@playwright/test';
 import { configs, test } from '@utils/test/playwright';
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('input: a11y'), () => {
     test('default layout should not have accessibility violations', async ({ page }) => {
       await page.setContent(

core/src/components/item-sliding/test/a11y/item-sliding.e2e.ts

@@ -4,7 +4,7 @@ import { configs, test } from '@utils/test/playwright';
 
 import { testSlidingItem } from '../test.utils';
 
-configs({ directions: ['ltr'], themes: ['light', 'dark'] }).forEach(({ title, config }) => {
+configs({ directions: ['ltr'], palettes: ['light', 'dark'] }).forEach(({ title, config }) => {
   test.describe(title('item-sliding: a11y for ion-color()'), () => {
     test('should not have accessibility violations', async ({ page }) => {
       await page.setContent(