dev

cranelift: fix broken `selinux-fix` refactor (#4001)

v0.26.1-patch.1 - Cherry-pick #3063 to dfinity/v0.26

This patch is taken from
bytecodealliance#3079
which in turn a cherry-pick of bytecodealliance#3063 adjusted for v0.26:
bytecodealliance#3063

• Restore POSIX signal handling on MacOS behind a feature flag

As described in Issue bytecodealliance#3052, the switch to Mach Exception handling
removed unix::StoreExt from the public API of crate on MacOS.
hat is a breaking change and makes it difficult for some
application to upgrade to the current stable Wasmtime.

As a workaround this PR introduces a feature flag called
posix-signals-on-macos that restores the old behaviour on MacOS.
The flag is disabled by default.

• Fix test guard

• Fix formatting in the test