This test shuts down a node and then replaces it with another one while
continuously writing to the cluster. The test has been observed to take
a lot of time in debug mode and time out on the replace operation.
Replace takes very long because rebuilding tablets on the new node is
very slow, and the slowest part is memtable flush which happens at the
beginning of streaming. The slowness seems to be specific to the debug
mode.
Turn off the test in debug mode to deflake the CI. As a follow-up, the
test is planned to be reworked into an quicker error injection test so
that the code path tested by this test will be again exercised in debug
unit tests (scylladb/scylladb#23898)
Fixes: scylladb/scylladb#20316Closesscylladb/scylladb#23900
82e1678fbe