Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

for MPP request, tiflash doesn't honor FlagIgnoreTruncate, tikv does, see pingcap/tidb#58443 (comment) too

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

ignore truncate error

3. What did you see instead (Required)

report error

4. What is your TiFlash version? (Required)

8.5