Auto merge of #6618 - ehuss:fix-progress-stdout, r=Eh2406
Auto merge of #6618 - ehuss:fix-progress-stdout, r=Eh2406

Fix overlapping progress with stdout.

Minor issue introduced in #6615. The progress bar was not being cleared for stdout output (because Shell only does stderr).

rustyhorde/cargo,tsurai/cargo,tsurai/cargo,eminence/cargo,eminence/cargo,rust-lang/cargo,tshepang/cargo,tshepang/cargo,tsurai/cargo,nipunn1313/cargo,rustyhorde/cargo,eminence/cargo,vojtechkral/cargo,tshepang/cargo,rust-lang/cargo,nipunn1313/cargo,tsurai/cargo,eminence/cargo,nipunn1313/cargo,vojtechkral/cargo,tsurai/cargo,vojtechkral/cargo,vojtechkral/cargo,rust-lang/cargo,tshepang/cargo,rustyhorde/cargo,rust-lang/cargo,rustyhorde/cargo,nipunn1313/cargo