DAOS-19103 test: call FI macro in interactive rebuild test

Add FAULT_INJECTION_REQUIRED() in a test that requires it
(int_rebuild_many_objects_with_failure) to prevent it hanging when
being run with a release type build (e.g., 2.8.0-rc1).

faults-enabled:  false
Test-tag: test_daos_rebuild_interactive
Skip-unit-tests: true
Skip-fault-injection-test: true
Skip-test-rpms: true

Signed-off-by: Kenneth Cain <kenneth.cain@hpe.com>

Author: kccain

src/tests/suite/daos_rebuild_interactive.c

@@ -224,6 +224,8 @@ int_rebuild_many_objects_with_failure(void **state)
 	int            rc;
 	int            i;
 
+	FAULT_INJECTION_REQUIRED();
+
 	if (!test_runable(arg, 6))
 		return;