The file generated by `Plan Replayer` has changed its storage path.

[zeminzhou]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. start a tidb cluster with TiDB version 550a05a;
2. execute plan replayer
3. check the file path
4. start a tidb cluster with TiDB master branch 45621f6
5. repeat 2,3

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

The paths to the generated files should be the same in both cases.

3. What did you see instead (Required)

The paths to the generated files are not the same in both cases.

4. What is your TiDB version? (Required)