tests: benchmarks: wait_queues: Increase test timeout to 120s

This commit increases the test timeout for the wait queue benchmark tests
to 120 seconds because these tests frequently hit the default timeout of 60
seconds during execution.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

tests/benchmarks/wait_queues/testcase.yaml

@@ -5,6 +5,7 @@ common:
   integration_platforms:
     - qemu_x86
     - qemu_cortex_a53
+  timeout: 120
   harness: console
   harness_config:
     type: one_line