fix(sledgehammer): Fix up arm64 Sledgehammer builds for Alma 9

Get rid of python3-crypto. It is unmaintained, has unfixable security bugs, and is not available in any prepackaged format for Alma 9.

Switch to using the distro-provided busybox, which is statically linked and has all of the functionality we need.

Fix up generated profile to have correct template paths for non amd64 sledgehammer builds.