Client font color will be broken after pipeline and `findstr` command are used in Windows CMD

[bim-msft]

Describe the bug

To Reproduce

1. Run az network private-endpoint list-types -l eastus2euap
2. Then run az network private-endpoint list-types -l eastus2euap | findstr vault

Environment summary
azure-cli dev branch 93a50bb
knack 0.6.3

[bim-msft]

@jiasli Please take a look.

[jiasli]

Will be fixed by microsoft/knack#181, #12604