Auto merge of #150535 - Kobzol:rename-ci-gcc, r=jieyouxu

Rename the gcc component to gcc-dev

In preparation for https://rust-lang.zulipchat.com/#narrow/channel/242791-t-infra/topic/Safe.20rustup.20distribution.20of.20rustc_codegen_gcc/with/565801325.

try-job: dist-x86_64-linux

Author: bors