Flush Icache on AArch64 Windows (#4997)

* cranelift: Add FlushInstructionCache for AArch64 on Windows

This was previously done on #3426 for linux.

* wasmtime: Add FlushInstructionCache for AArch64 on Windows

This was previously done on #3426 for linux.

* cranelift: Add MemoryUse flag to JIT Memory Manager

This allows us to keep the icache flushing code self-contained and not leak implementation details.

This also changes the windows icache flushing code to only flush pages that were previously unflushed.

* Add jit-icache-coherence crate

* cranelift: Use `jit-icache-coherence`

* wasmtime: Use `jit-icache-coherence`

* jit-icache-coherence: Make rustix feature additive

Mutually exclusive features cause issues.

* wasmtime: Remove rustix from wasmtime-jit

We now use it via jit-icache-coherence

* Rename wasmtime-jit-icache-coherency crate

* Use cfg-if in wasmtime-jit-icache-coherency crate

* Use inline instead of inline(always)

* Add unsafe marker to clear_cache

* Conditionally compile all rustix operations

membarrier does not exist on MacOS

* Publish `wasmtime-jit-icache-coherence`

* Remove explicit windows check

This is implied by the target_os = "windows" above

* cranelift: Remove len != 0 check

This is redundant as it is done in non_protected_allocations_iter

* Comment cleanups

Thanks @akirilov-arm!

* Make clear_cache safe

* Rename pipeline_flush to pipeline_flush_mt

* Revert "Make clear_cache safe"

This reverts commit 21165d81c9030ed9b291a1021a367214d2942c90.

* More docs!

* Fix pipeline_flush reference on clear_cache

* Update more docs!

* Move pipeline flush after `mprotect` calls

Technically the `clear_cache` operation is a lie in AArch64, so move the pipeline flush after the `mprotect` calls so that it benefits from the implicit cache cleaning done by it.

* wasmtime: Remove rustix backend from icache crate

* wasmtime: Use libc for macos

* wasmtime: Flush icache on all arch's for windows

* wasmtime: Add flags to membarrier call

scripts/publish.rs

@@ -36,6 +36,7 @@ const CRATES_TO_PUBLISH: &[&str] = &[
     "cranelift-object",
     "cranelift-interpreter",
     "cranelift",
+    "wasmtime-jit-icache-coherence",
     "cranelift-jit",
     // wiggle
     "wiggle-generate",