import json data with routine load can't success if json data contains unescaped character

[kaijianding]

Steps to reproduce the behavior (Required)

1. CREATE routine load to ingest json data
2. unescaped character in json

Expected behavior (Required)

1. task success with this row skipped
2. errorRows increases

Real behavior (Required)

routine load tasks failed repeatly:

2024-05-08 09:24:04,644 WARN (thrift-server-pool-667203|857580) [RoutineLoadJob.executeTaskOnTxnStatusChanged():1048] routine load task [job name xxxx, task id 36869260-d0ce-4ebd-bec8-423d6d78e08f] aborted because of Failed to iterate document stream as object. error: Within strings, some characters must be escaped, we found unescaped characters, remove old task and generate new one

StarRocks version (Required)

• 2.5.20