sql: fix TestSQLStatsCompactor flaky test

This patch disables auto split ranges for the
test because it causes extra wide scan to be counted by
`kvInterceptor`.

Release note: None

Author: koorosh

pkg/sql/sqlstats/persistedsqlstats/compaction_test.go

@@ -141,7 +141,8 @@ func TestSQLStatsCompactor(t *testing.T) {
 							},
 						},
 						Store: &kvserver.StoreTestingKnobs{
-							TestingRequestFilter: kvInterceptor.intercept,
+							TestingRequestFilter:      kvInterceptor.intercept,
+							DisableLoadBasedSplitting: true,
 						},
 					},
 				},