DAOS-15852 test: more timing samples for co_op_dup_timing() (#14497)

Rarely, this test will produce timings that exceed the failure
threshold. Local and PR/CI experiments have shown that increasing
the test's NUM_OPS to more than 200 iterations greatly reduces
or may eliminate such intermittent timing failures, by "spreading out"
the magnitude of the time spent in the 3 main loops of the test
(0% loops perform fault injections, 33%, and 50%).

Test-tag: test_daos_container
Skip-unit-tests: true
Skip-fault-injection-test: true

Signed-off-by: Kenneth Cain <[email protected]>

src/tests/suite/daos_container.c

@@ -3835,7 +3835,7 @@ co_op_dup_timing(void **state)
 	size_t const       in_sizes[]        = {strlen(in_values[0]), strlen(in_values[1])};
 	int                n                 = (int)ARRAY_SIZE(names);
 	const unsigned int NUM_FP            = 3;
-	const uint32_t     NUM_OPS           = 200;
+	const uint32_t     NUM_OPS           = 500;
 	uint32_t           num_failures      = 0;
 	const uint32_t     SVC_OPS_ENABLED   = 1;
 	const uint32_t     SVC_OPS_ENTRY_AGE = 60;