fix(longevity-cdc-4h): increase test timeout
fix(longevity-cdc-4h): increase test timeout

lately tests were failing. there was already
a PR (#2885) that decreased the c-s load time.
but it is still seem not enough, so most likely
increasing the test timeout by 30 minutes will
be enough to let the c-s end and not fail.

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests