test: fix flaky test_read_repair_with_trace_logging by reading tracing with CL=ALL

Tracing events are written to system_traces.events with CL=ANY, so they
are only guaranteed to be present on the local node of the query
coordinator. Reading them back with the driver default (CL=LOCAL_ONE)
may route the query to a replica that has not yet received all events,
causing the assertion on 'digest mismatch, starting read repair' to fail
intermittently.

Fix execute_with_tracing() to read tracing via the ResponseFuture API
with query_cl=ConsistencyLevel.ALL, so events from all replicas are
merged before the caller inspects them.

Fixes: SCYLLADB-1707

Closes scylladb/scylladb#29566

(cherry picked from commit b49cf6247f)

test/pylib/util.py

@@ -393,7 +393,12 @@ def execute_with_tracing(cql : Session, statement : str | Statement, log : bool
     cql_execute_extra_kwargs['trace'] = True
     query_result = cql.execute(statement, *cql_execute_extra_args, **cql_execute_extra_kwargs)
 
-    tracing = query_result.get_all_query_traces(max_wait_sec_per=900)
+    # Tracing events are written to system_traces.events with CL=ANY, so they are
+    # only guaranteed to be present on the local node of the query coordinator.
+    # Reading them back with the driver default (CL=LOCAL_ONE) may hit a replica
+    # that has not yet received all events, causing intermittent failures.
+    # Using CL=ALL ensures events from all replicas are merged.
+    tracing = query_result.response_future.get_all_query_traces(max_wait_per=900, query_cl=ConsistencyLevel.ALL)
 
     ret = []
     page_traces = []