community/rust: add rustfmt subpackage, upgrade to 1.58.1

the bundle remove loop was not doing anything- ls -1 some/path lists the contents of the directory (in this case e.g. clang, llvm, etc) without the leading path, and then doing an rm -rf on that name doesn't delete anything as it does not cd to the folder or add the path to it. fixing the script to actually delete the parts fails to build- so this was just dead code