[e2e] Increase timeout for Memory tests

Before moving the test to e2e non hosted the test had timeout
of 100_000, I lowered it to 20_000 but it seems like the bots need
more so bumping them a little bit before we investigate.

Bug: none
Change-Id: I94a35397a9a5b7de48f15bae87e6089759682c7a
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6765762
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Commit-Queue: Nikolay Vitkov <nvitkov@chromium.org>
Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>

Author: Lightning00Blade

test/e2e_non_hosted/memory/memory_test.ts

@@ -66,7 +66,7 @@ describe('The Memory Panel', function() {
   // through it. On bots with less CPU power, these can fail because the
   // rendering takes a long time, so we allow a much larger timeout.
   if (this.timeout() !== 0) {
-    this.timeout(20_000);
+    this.timeout(30_000);
   }
 
   setup({dockingMode: 'undocked'});