logictest: (speculatively) de-flake distsql_enum

We opted this test out of using the span configs infra in cockroachdb#75281 after
observing a CI flake. Following the analysis in the last commit, it may
have been due to stale distsender caches affecting the physical plan
generated.

This fix is speculative because I was unable to repro the original flake
under stress. Attempt (successful after 1000s of runs on GCE worker over
20+ minutes):

    dev test pkg/sql/logictest \
    -f 'TestLogic/^5node-disk$/distsql_enum' \
    --show-logs -v --stress --stress-args '-p 4' -- --test_arg -show-sql

Release note: None

pkg/sql/logictest/testdata/logic_test/distsql_enum

@@ -1,5 +1,4 @@
 # LogicTest: 5node-default-configs !5node-metadata
-# cluster-opt: disable-span-configs
 
 # Regression test for nested tuple enum hydration (#74189)
 statement ok
@@ -66,7 +65,7 @@ ALTER TABLE t2 INJECT STATISTICS '[
   }
 ]'
 
-query T nodeidx=1
+query T nodeidx=1 retry
 EXPLAIN (VEC)
 SELECT x from t1 WHERE EXISTS (SELECT x FROM t2 WHERE t1.x=t2.x AND t2.y='hello')
 ----