rcutorture: Add NOCB01 config for RCU_LAZY torture testing

Add new rcutorture config NOCB01 that enables CONFIG_RCU_LAZY combined
with CONFIG_RCU_NOCB_CPU to exercise the lazy callback code paths in
the NOCB implementation.

This config exercises lazy callback paths not covered by other configs,
including lazy-only wake and lazy defer logic.

This config is not added to CFLIST to avoid increasing the default
test duration; it can be run explicitly when lazy callback testing
is needed.

Acked-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Tested-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>