Restore still check the empty cluster even when filter is specified

[3pointer]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. restore full with --filter arguments to a non-empty cluster.

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

restore start

3. What did you see instead (Required)

restore not pass requirements-check.

4. What is your TiDB version? (Required)

since v7.3

[benmaoer]

Lost affect version tag