[MINOR] fix: Update outdated config: rss.writer.send.check.timeout -> rss.client.send.check.timeout.ms (apache#1734)

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

Update outdated config: rss.writer.send.check.timeout -> rss.client.send.check.timeout.ms.

### Why are the changes needed?

The `rss.writer.send.check.timeout` configuration has been renamed to `rss.client.send.check.timeout.ms`, no longer in use.

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

No.

### How was this patch tested?

No need.

Author: rickyma

README.md

@@ -179,7 +179,7 @@ If you have packaged tgz with hadoop jars, the env of `HADOOP_HOME` is needn't s
     rss.coordinator.remote.storage.path hdfs://cluster1/path,hdfs://cluster2/path
     rss.writer.require.memory.retryMax 1200
     rss.client.retry.max 50
-    rss.writer.send.check.timeout 600000
+    rss.client.send.check.timeout.ms 600000
     rss.client.read.buffer.size 14m
    ```
 5. start Coordinator

client-spark/spark2/src/test/java/org/apache/spark/shuffle/writer/RssShuffleWriterTest.java

@@ -133,7 +133,7 @@ public void checkBlockSendResultTest() {
     rssShuffleWriter.checkBlockSendResult(Sets.newHashSet(1L, 2L, 3L));
     manager.clearTaskMeta(taskId);
 
-    // case 2: partial blocks aren't sent before spark.rss.writer.send.check.timeout,
+    // case 2: partial blocks aren't sent before spark.rss.client.send.check.timeout.ms,
     // Runtime exception will be thrown
     manager.addSuccessBlockIds(taskId, Sets.newHashSet(1L, 2L));
     Throwable e2 =

client-spark/spark3/src/test/java/org/apache/spark/shuffle/writer/RssShuffleWriterTest.java

@@ -334,7 +334,7 @@ public void checkBlockSendResultTest() {
     rssShuffleWriter.checkBlockSendResult(Sets.newHashSet(1L, 2L, 3L));
     successBlocks.clear();
 
-    // case 2: partial blocks aren't sent before spark.rss.writer.send.check.timeout,
+    // case 2: partial blocks aren't sent before spark.rss.client.send.check.timeout.ms,
     // Runtime exception will be thrown
     successBlocks.put("taskId", Sets.newHashSet(1L, 2L));
     Throwable e2 =

docs/coordinator_guide.md

@@ -58,7 +58,7 @@ This document will introduce how to deploy Uniffle coordinators.
     rss.coordinator.remote.storage.path hdfs://cluster1/path,hdfs://cluster2/path
     rss.writer.require.memory.retryMax 1200
     rss.client.retry.max 100
-    rss.writer.send.check.timeout 600000
+    rss.client.send.check.timeout.ms 600000
     rss.client.read.buffer.size 14m
    ```