Prepare for switch to testcontainers in playwright (#28880)

* Remove access to homeserver.config.baseUrl field in favour of homeserver.baseUrl

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Use sane default_server_config and specify server.invalid in the specific tests which demand it

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* break cycle

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* typo

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

---------

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

playwright/e2e/login/overwrite_login.spec.ts

@@ -13,7 +13,7 @@ test.describe("Overwrite login action", () => {
     // This seems terminally flakey: https://github.com/element-hq/element-web/issues/27363
     // I tried verious things to try & deflake it, to no avail: https://github.com/matrix-org/matrix-react-sdk/pull/12506
     test.skip("Try replace existing login with new one", async ({ page, app, credentials, homeserver }) => {
-        await logIntoElement(page, homeserver, credentials);
+        await logIntoElement(page, credentials);
 
         const userMenu = await app.openUserMenu();
         await expect(userMenu.getByText(credentials.userId)).toBeVisible();
@@ -24,7 +24,7 @@ test.describe("Overwrite login action", () => {
         expect(credentials.userId).not.toBe(bobRegister.userId);
 
         const clientCredentials /* IMatrixClientCreds */ = {
-            homeserverUrl: homeserver.config.baseUrl,
+            homeserverUrl: homeserver.baseUrl,
             ...bobRegister,
         };