Make dynamic_linking a no-op on wasm targets (#12672)

# Objective
Resolve #10054.

## Solution
Make dynamic linking a no-op by omitting it from the dependency tree on
wasm targets.

To test this, try `cargo build --lib --target wasm32-unknown-unknown
--features bevy/dynamic_linking` with and without this PR.

Might need to update the book on the website to explain this when this
makes it into a release.

Co-Authored By: @daxpedda

---------

Co-authored-by: BD103 <[email protected]>

Author: james7132

Cargo.toml

@@ -330,9 +330,12 @@ meshlet_processor = ["bevy_internal/meshlet_processor"]
 ios_simulator = ["bevy_internal/ios_simulator"]
 
 [dependencies]
-bevy_dylib = { path = "crates/bevy_dylib", version = "0.14.0-dev", default-features = false, optional = true }
 bevy_internal = { path = "crates/bevy_internal", version = "0.14.0-dev", default-features = false }
 
+# WASM does not support dynamic linking.
+[target.'cfg(not(target_family = "wasm"))'.dependencies]
+bevy_dylib = { path = "crates/bevy_dylib", version = "0.14.0-dev", default-features = false, optional = true }
+
 [dev-dependencies]
 rand = "0.8.0"
 rand_chacha = "0.3.1"

src/lib.rs

@@ -48,6 +48,7 @@
 
 pub use bevy_internal::*;
 
-#[cfg(feature = "dynamic_linking")]
+// WASM does not support dynamic linking.
+#[cfg(all(feature = "dynamic_linking", not(target_family = "wasm")))]
 #[allow(unused_imports)]
 use bevy_dylib;