Update test timeout to 90 seconds, and suggest using `DEFAULT_TIMEOUT_OVERRIDE` in E2E README (#38288)

plugins/woocommerce/changelog/e2e-update-timeout-readme

@@ -0,0 +1,4 @@
+Significance: patch
+Type: dev
+
+Update the E2E test timeout to 90 sec, and update the E2E README.

plugins/woocommerce/tests/e2e-pw/README.md

@@ -53,7 +53,12 @@ Other ways of running tests (make sure you are in the `plugins/woocommerce` fold
 -   `pnpm test:e2e-pw --headed` (headed -- displaying browser window and test interactions)
 -   `pnpm test:e2e-pw --debug` (runs tests in debug mode)
 -   `pnpm test:e2e-pw ./tests/e2e-pw/tests/activate-and-setup/basic-setup.spec.js` (runs a single test)
--   `pnpm test:e2e-pw --ui` (open tests in [Playwright UI mode](https://playwright.dev/docs/test-ui-mode))
+-   `pnpm test:e2e-pw --ui` (open tests in [Playwright UI mode](https://playwright.dev/docs/test-ui-mode)). You may need to increase the [test timeout](https://playwright.dev/docs/api/class-testconfig#test-config-timeout) from the 90-second default, as tests might take longer to execute when ran through the Playwright UI. You may do this by setting the `DEFAULT_TIMEOUT_OVERRIDE` environment variable like so:
+	```bash
+	# Increase test timeout to 3 minutes
+	export DEFAULT_TIMEOUT_OVERRIDE=180000
+	pnpm test:e2e-pw --ui
+	```
 
 To see all options, make sure you are in the `plugins/woocommerce` folder and run `pnpm playwright test --help`
 

plugins/woocommerce/tests/e2e-pw/playwright.config.js

@@ -11,7 +11,7 @@ const {
 const config = {
 	timeout: DEFAULT_TIMEOUT_OVERRIDE
 		? Number( DEFAULT_TIMEOUT_OVERRIDE )
-		: 300 * 1000,
+		: 90 * 1000,
 	expect: { timeout: 20 * 1000 },
 	outputDir: './test-results/report',
 	globalSetup: require.resolve( './global-setup' ),