TiUP don't respect pipeline rules

[innerr]

Bug Report

1. What did you do? tiup .... | tee my.log (in a screen, but this is not important)

2. What did you expect to see? Regular output. Since tiup is in a pipe, it should not use too much ctrl-chars.

3. What did you see instead? Crazily binding output with unrecognizable chars

4. What version of TiUP are you using (tiup --version)? v1.3.2 tiup Go Version: go1.13 Git Branch: release-1.3 GitHash: 2d88460