Merge pull request from GHSA-wh6w-3828-g9qf

* Unconditionally use `MemoryImageSlot`

This commit removes the internal branching within the pooling instance
allocator to sometimes use a `MemoryImageSlot` and sometimes now.
Instead this is now unconditionally used in all situations on all
platforms. This fixes an issue where the state of a slot could get
corrupted if modules being instantiated switched from having images to
not having an image or vice versa.

The bulk of this commit is the removal of the `memory-init-cow`
compile-time feature in addition to adding Windows support to the
`cow.rs` file.

* Fix compile on Unix

* Add a stricter assertion for static memory bounds

Double-check that when a memory is allocated the configuration required
is satisfied by the pooling allocator.

crates/cli-flags/Cargo.toml

@@ -25,5 +25,4 @@ default = [
     "wasmtime/parallel-compilation",
 ]
 pooling-allocator = []
-memory-init-cow = []
 component-model = []