Playwright test for history sharing on invite (#30948)

* Playwright: `getCurrentRoomIdFromUrl`

Helper function to fish a room ID out of the URL

* Playwright: use updated `Credentials` class from common lib

Pick up the extended `Credentials` interface that was added in
https://github.com/element-hq/element-modules/pull/80.

* Playwright: use `routeConfigJson` from common lib

https://github.com/element-hq/element-modules/pull/81 added a utility function
for building and routing `config.json`; we should use it.

* Playwright test for history sharing on invite

Fixes https://github.com/element-hq/element-meta/issues/2920

* Avoid use of CSS in playwright locators

package.json

@@ -186,7 +186,7 @@
         "@babel/runtime": "^7.12.5",
         "@casualbot/jest-sonar-reporter": "2.2.7",
         "@element-hq/element-call-embedded": "0.16.0",
-        "@element-hq/element-web-playwright-common": "^1.4.6",
+        "@element-hq/element-web-playwright-common": "^2.0.0",
         "@peculiar/webcrypto": "^1.4.3",
         "@playwright/test": "^1.50.1",
         "@principalstudio/html-webpack-inject-preload": "^1.2.7",