Fix flaky playwright tests (#28975)

* Fix flaky tests

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

* Fix flaky tests

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

* Fix mas config

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

* Fix another flaky test

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

---------

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

playwright/testcontainers/mas.ts

@@ -168,6 +168,16 @@ const DEFAULT_CONFIG = {
         access_token_ttl: 300,
         compat_token_ttl: 300,
     },
+    rate_limiting: {
+        login: {
+            burst: 10,
+            per_second: 1,
+        },
+        registration: {
+            burst: 10,
+            per_second: 1,
+        },
+    },
 };
 
 export class MatrixAuthenticationServiceContainer extends GenericContainer {

playwright/testcontainers/synapse.ts

@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
 Please see LICENSE files in the repository root for full details.
 */
 
-import { AbstractStartedContainer, GenericContainer, StartedTestContainer, Wait } from "testcontainers";
+import { AbstractStartedContainer, GenericContainer, RestartOptions, StartedTestContainer, Wait } from "testcontainers";
 import { APIRequestContext } from "@playwright/test";
 import crypto from "node:crypto";
 import * as YAML from "yaml";
@@ -239,6 +239,11 @@ export class StartedSynapseContainer extends AbstractStartedContainer implements
         super(container);
     }
 
+    public restart(options?: Partial<RestartOptions>): Promise<void> {
+        this.adminToken = undefined;
+        return super.restart(options);
+    }
+
     public setRequest(request: APIRequestContext): void {
         this.request = request;
     }