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 = []

crates/cli-flags/src/lib.rs

@@ -218,7 +218,6 @@ pub struct CommonOptions {
 
     /// Disable the default of attempting to initialize linear memory via a
     /// copy-on-write mapping
-    #[cfg(feature = "memory-init-cow")]
     #[clap(long)]
     pub disable_memory_init_cow: bool,
 
@@ -324,7 +323,6 @@ impl CommonOptions {
 
         config.epoch_interruption(self.epoch_interruption);
         config.generate_address_map(!self.disable_address_map);
-        #[cfg(feature = "memory-init-cow")]
         config.memory_init_cow(!self.disable_memory_init_cow);
 
         #[cfg(feature = "pooling-allocator")]