validation: Test rtems_interrupt_set_affinity()

Update #3269.

spec/build/testsuites/validation/validation-0.yml

@@ -23,6 +23,7 @@ source:
 - testsuites/validation/tc-intr-is-pending.c
 - testsuites/validation/tc-intr-raise.c
 - testsuites/validation/tc-intr-raise-on.c
+- testsuites/validation/tc-intr-set-affinity.c
 - testsuites/validation/tc-intr-vector-disable.c
 - testsuites/validation/tc-intr-vector-enable.c
 - testsuites/validation/tc-intr-vector-is-enabled.c