Merge branch 'asof_join_pause' into combined2

Author: Rafał Hibner

cpp/src/arrow/acero/asof_join_node_test.cc

@@ -1645,8 +1645,8 @@ TEST(AsofJoinTest, PauseProducingAsofJoinSource) {
   };
 
   // Should be able to push kPauseIfAbove batches without triggering back pressure
-  uint32_t l_cnt = 0;
-  uint32_t r_cnt = 0;
+  int64_t l_cnt = 0;
+  int64_t r_cnt = 0;
 
   EXPECT_FALSE(is_l_paused());
   EXPECT_FALSE(is_r_paused());