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/register/email.spec.ts

@@ -21,12 +21,11 @@ test.describe("Email Registration", async () => {
                     SMTP_PORT: mailhog.instance.smtpPort,
                 },
             }),
-        config: ({ homeserver }, use) =>
+        config: ({ config }, use) =>
             use({
+                ...config,
                 default_server_config: {
-                    "m.homeserver": {
-                        base_url: homeserver.config.baseUrl,
-                    },
+                    ...config.default_server_config,
                     "m.identity_server": {
                         base_url: "https://server.invalid",
                     },
@@ -34,7 +33,7 @@ test.describe("Email Registration", async () => {
             }),
     });
 
-    test.beforeEach(async ({ page }) => {
+    test.beforeEach(async ({ homeserver, page }) => {
         await page.goto("/#/register");
     });