MB-42976: Skip test_multi_set of ep_testsuite_basic for Magma

test_multi_set() of ep_testsuite_basic.cc keeps timing out for magma
under TSAN, this is likely to be due to a performance issue with Magma.
So skip the test for Magma to ensure we don't block patches in CV, while
the issue is investigated by the Magma team.

Change-Id: I179b3680858fa3d70e73ca1a3614e91f73c33e6b
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/141132
Reviewed-by: Paolo Cocchi <[email protected]>
Tested-by: Build Bot <[email protected]>

Author: rdemellow

engines/ep/tests/ep_testsuite_basic.cc

@@ -2310,7 +2310,7 @@ BaseTestCase testsuite_testcases[] = {
                  test_setup,
                  teardown,
                  nullptr,
-                 prepare,
+                 prepare_ep_bucket_skip_broken_under_magma,
                  cleanup),
         TestCase("set+get hit",
                  test_set_get_hit,