ddl, transaction: DDL on temporary tables won't affect transactions in v4.0

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Schema change on a global temporary table may happen during a transaction that writes to the temporary table. Unlike normal tables, the transaction won’t overwrite other transactions, so it’s fine to commit.

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

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

[hawkingrei]

fixed by #24534