Specify Synapse ui_auth.session_timeout only on tests which require it (#28939)

* Specify Synapse ui_auth.session_timeout only on tests which require it

As Dendrite lacks this configuration option

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/plugins/homeserver/synapse/uiaLongSessionTimeoutHomeserver.ts

@@ -0,0 +1,24 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { Fixtures } from "@playwright/test";
+
+import { Services } from "../../../services.ts";
+
+export const uiaLongSessionTimeoutHomeserver: Fixtures<{}, Services> = {
+    synapseConfigOptions: [
+        async ({ synapseConfigOptions }, use) => {
+            await use({
+                ...synapseConfigOptions,
+                ui_auth: {
+                    session_timeout: "300s",
+                },
+            });
+        },
+        { scope: "worker" },
+    ],
+};