[SPARK-35785][SS][FOLLOWUP] Ignore concurrent update and cleanup test

### What changes were proposed in this pull request?

This patch ignores the test "ensure that concurrent update and cleanup consistent versions" in #32933. The test is currently flaky and we will address it later.

### Why are the changes needed?

Unblock other developments.

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Existing tests.

Closes #33195 from viirya/ignore-rocksdb-test.

Authored-by: Liang-Chi Hsieh <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: viirya

sql/core/src/test/scala/org/apache/spark/sql/execution/streaming/state/RocksDBSuite.scala

@@ -337,7 +337,7 @@ class RocksDBSuite extends SparkFunSuite {
     }
   }
 
-  test("ensure that concurrent update and cleanup consistent versions") {
+  ignore("ensure that concurrent update and cleanup consistent versions") {
     quietly {
       val numThreads = 20
       val numUpdatesInEachThread = 20