chore: increase timeout for sp_route_interrupt_to_secondary_vcpu

This test often fails in CI due to timeout. Qualify it as long running
test.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I437f02060fdc79fb78b92d0f751bf522707e0042
diff --git a/test/vmapi/ffa_secure_partitions/secure_interrupts.c b/test/vmapi/ffa_secure_partitions/secure_interrupts.c
index ae7cae4..51e6c52 100644
--- a/test/vmapi/ffa_secure_partitions/secure_interrupts.c
+++ b/test/vmapi/ffa_secure_partitions/secure_interrupts.c
@@ -532,7 +532,7 @@
  * Test a Secure Partition can request the SPMC to reconfigure an interrupt to
  * be routed to a secondary vCPU.
  */
-TEST(secure_interrupts, sp_route_interrupt_to_secondary_vcpu)
+TEST_LONG_RUNNING(secure_interrupts, sp_route_interrupt_to_secondary_vcpu)
 {
 	struct secondary_cpu_entry_args args = {.lock = SPINLOCK_INIT};
 	struct mailbox_buffers mb = set_up_mailbox();