lang/rust: Update to 1.57.0

• Unbreak build with LibreSSL 3.4.x [0]
• Disable backtrace's libunwind backend on armv* since it or libunwind in base seem to be buggy and cause rustc to crash when building some consumers [1]
• Follow rust-nightly in d5f09dc31fcfdb77b69c86b9093bf67ec67653d9 and reenable hardlinks in the build

Changes: https://blog.rust-lang.org/2021/12/02/Rust-1.57.0.html
PR: 259738 [0]
PR: 259799 [1]
PR: 260140
Exp-run by: antoine
Differential Revision: https://reviews.freebsd.org/D33190
With hat: rust