The KILL statement terminate a system table query connection for long time

[lilinghai]

Bug Report

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1. Minimal reproduce step (Required)

millions tables
kill select count(*) from INFORMATION_SCHEMA.partitions;
it takes about 15 minutes kill the connection

[2024/11/27 03:45:34.419 +00:00] [WARN] [sqlkiller.go:61] ["kill initiated"] ["connection ID"=2405433398] [reason="[executor:1317]Query execution was interrupted"]
[2024/11/27 04:00:58.467 +00:00] [WARN] [sqlkiller.go:137] ["kill finished"] [conn=2405433398]

Same scenario for max_execution_time
set @@max_execution_time=1000;
select count(*) from INFORMATION_SCHEMA.partitions;
it takes about 17 minutes terminate the query

[2024/11/27 04:07:49.399 +00:00] [WARN] [expensivequery.go:97] ["execution timeout, kill it"] [costTime=17m24.497578181s] [maxExecutionTime=1s] [processInfo="{id:1579157424, user:root, host:10.200.0.166:60519, db:<nil>, command:Query, time:1044, state:autocommit, info:select count(*) from INFORMATION_SCHEMA.partitions}"]
[2024/11/27 04:07:49.399 +00:00] [INFO] [server.go:913] [kill] [conn=1579157424] [query=true] [maxExecutionTime=true] [runawayExceed=false]
[2024/11/27 04:07:49.499 +00:00] [WARN] [expensivequery.go:97] ["execution timeout, kill it"] [costTime=17m24.59749879s] [maxExecutionTime=1s] [processInfo="{id:1579157424, user:root, host:10.200.0.166:60519, db:<nil>, command:Query, time:1044, state:autocommit, info:select count(*) from INFORMATION_SCHEMA.partitions}"]
[2024/11/27 04:07:49.528 +00:00] [ERROR] [terror.go:317] ["function call errored"] [error="[executor:3024]Query execution was interrupted, maximum statement execution time exceeded"] 

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

master
dcc9dcc