fabefd9915 ci: Turn CentOS task into native one (MarcoFalke)
Pull request description:
Cross-compiling to `i686-pc-linux-gnu` on CentOS in the CI is mostly redundant with the `ci/test/00_setup_env_i686_multiprocess.sh` task (albeit it using clang):
35bf426e02/ci/test/00_setup_env_i686_multiprocess.sh (L9-L12)
One task seems sufficient as a sanity check, given that there seems to be no real demand for this architecture anyway.
Turning the task into a native one makes it possible to run the task natively on aarch64 or any other supported architecture.
Also, remove the install of the `lbzip2` package, which is unused since commit a46065e36c
Also, remove the `CONFIG_SHELL` env var, which is unused since the cmake migration. (`CONFIG_SHELL` in depends is still kept).
ACKs for top commit:
davidgumberg:
ACK fabefd9915
hebasto:
ACK fabefd9915, tested locally on Ubuntu 24.10.
Tree-SHA512: 5a7b3131b379d11ef602e5821165861e9bdf61d605014bf8fcb33b8e12d8823450798af2d3289b96f7559dfa47b839bf939ddc0b3725efecfeac7ae570a981e7
832d573073