fix(test): raise timeout for cluster PubSub listener-move test

[nkaradzhov]

This pull request fixes a flaky CI failure in the cluster PubSub test should move listeners when PubSub node disconnects from the cluster, which has been intermittently failing across many PRs with:

Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.

Background: #3347 fixed the earlier CLUSTERDOWN flake by claiming slots on the importing node first, releasing them on the migrating node, then polling both nodes for cluster_state:ok before triggering the MOVED redirect. That removed the CLUSTERDOWN window but made the test body heavier — it reassigns all 8192 slots one-by-one and then polls each node. On slow CI runners that work exceeds mocha's default 2000ms per-test timeout.

testWithCluster ran its it() at the default timeout with no override (only the before hook set 30000ms, which does not apply to the test). This adds an optional testTimeout to the shared CommonTestOptions, applies it in testWithCluster's it() when set, and raises this test's timeout to 30000ms.

Behavior note: the option is guarded (if (options.testTimeout) this.timeout(...)), so all other cluster tests keep the default timeout and are unaffected. The test typically finishes fast; the higher ceiling only covers the worst-case slow-runner path.

🤖 Generated with Claude Code

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Note

Low Risk
Changes are limited to test helpers and one cluster integration test; no production client or runtime behavior is modified.

Overview
Stabilizes the cluster PubSub test should move listeners when PubSub node disconnects from the cluster by replacing thousands of per-slot CLUSTER SETSLOT .. NODE calls with clusterDelSlotsRange / clusterAddSlotsRange on the migrating and importing nodes, then polling until both report cluster_state:ok. Slot selection now compares master addresses instead of object identity when picking the half-cluster range to move.

test-utils gains optional testTimeout on shared cluster test options; testWithCluster applies it to the Mocha it() when set. This test uses 30s so slow CI runners are not capped by the default 2s test timeout.

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