Potential concurrency issue when executing exchange partition

[JaySon-Huang]

Bug Report

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1. Minimal reproduce step (Required)

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

3. What did you see instead (Required)

tiflash/dbms/src/TiDB/Schema/SchemaBuilder.cpp

Lines 128 to 131 in 1addc37

	table_id_map.eraseTableIDOrLogError(diff.old_table_id);
	table_id_map.emplaceTableID(diff.table_id, diff.schema_id);
	table_id_map.erasePartitionTableIDOrLogError(diff.table_id);
	table_id_map.emplacePartitionTableID(diff.old_table_id, diff.affected_opts[0].table_id);

Executing exchange partition in table id mapping is not atomic

4. What is your TiFlash version? (Required)

master/7.5.0

[JaySon-Huang]

resolved in #8402