search "bit_xor(concat" in dashbaord, report "InvalidRequest(\\\"illegal regular expression" in log

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

set global tidb_enable_dist_task = 1;
set global tidb_server_memory_limit_gc_trigger=0.99;
set global tidb_server_memory_limit='88%';
admin check table xxx;

### 2. What did you expect to see? (Required)
no error

### 3. What did you see instead (Required)
[2023/11/15 11:22:51.600 +00:00] [ERROR] [mod.rs:96] ["search log RPC error"] [error="RpcFailure(RpcStatus { code: 2-UNKNOWN, message: \"InvalidRequest(\\\"illegal regular expression: Syntax(\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\nregex parse error:\\\\n (?i)(bit_xor(concat(id,\\\\n ^\\\\nerror: unclosed group\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\n)\\\")\", details: [] })"] [thread_id=0x5]
[2023/11/15 11:23:11.312 +00:00] [ERROR] [mod.rs:96] ["search log RPC error"] [error="RpcFailure(RpcStatus { code: 2-UNKNOWN, message: \"InvalidRequest(\\\"illegal regular expression: Syntax(\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\nregex parse error:\\\\n (?i)(bit_xor(concat(id,\\\\n ^\\\\nerror: unclosed group\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\n)\\\")\", details: [] })"] [thread_id=0x5]
[2023/11/15 11:23:30.395 +00:00] [ERROR] [mod.rs:96] ["search log RPC error"] [error="RpcFailure(RpcStatus { code: 2-UNKNOWN, message: \"InvalidRequest(\\\"illegal regular expression: Syntax(\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\nregex parse error:\\\\n (?i)(bit_xor(concat(id,\\\\n ^\\\\nerror: unclosed group\\\\n~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\n)\\\")\", details: [] })"] [thread_id=0x5]
[2023/11/15 11:24:21.589 +00:00] [INFO] [util.rs:638] ["connecting to PD endpoint"] [endpoints=http://upstream-pd-2.upstream-pd-peer.xd-br-pitr-nr7j8.svc:2379] [thread_id=0x5]

2023-11-15 19:22:51 (UTC+08:00)PD upstream-pd-1.upstream-pd-peer.xd-br-pitr-nr7j8.svc:2379[task.go:143] ["LogSearchTask stopped with error"] [task="LogSearchTask { id = 37, target = tidb(upstream-tidb-1.upstream-tidb-peer.xd-br-pitr-nr7j8.svc:4000), task_group_id = 5 }"] [err="rpc error: code = Unknown desc = error parsing regexp: missing closing ): `(?i)(bit_xor(concat(id,`"]

### 4. What is your TiDB version? (Required)

7.5.0-pre