* CMakeLists: pass `-Dstrip` for release zig builds
* pass -target and -mcpu to zig1. works around llvm on freebsd
incorrectly detecting "freestanding" instead of "freebsd" for the
native OS.
* ci.ziglang.org is now responsible for creating aarch64-macos tarballs
rather than Azure.
Upstream LLVM fixes#8597, no longer need `-Dskip-debug` and others.
Additionally, due to the nature of drone.io server pool, it is
beneficial to know which aarch64 CPU brand is in use.
- drop `-Dskip-debug` and others
- invoke `lscpu` prior to build
- enable more testsuite consistent with ci azure
- remove workaround for (already closed) #6830closes#8597