Rollup merge of #72560 - JohnTitor:glacier, r=Mark-Simulacrum
Rollup merge of #72560 - JohnTitor:glacier, r=Mark-Simulacrum

Enable `glacier` command via triagebot

I noticed this was required by https://github.com/rust-lang/rust/issues/72554#issuecomment-633393847.

graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust