rcutorture: Add CONFIG_PROVE_RCU_LIST to TREE05

Currently, the CONFIG_PROVE_RCU_LIST=y case is untested.  This commit
therefore adds CONFIG_PROVE_RCU_LIST=y to rcutorture's TREE05 scenario.

Cc: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>