Disable unused-import warnings on __with_name* aliases. (#1372)

* Disable unused-import warnings on `__with_name*` aliases.

These don't always get used, so disable unused-import warnings for them.

* Disable unused_lint_expectations warnings too; sometimes the aliases are used.

* rustfmt

* Fix more warnings.

Author: sunfishcode

crates/rust/src/lib.rs

@@ -398,6 +398,10 @@ impl RustWasm {
             TypeGeneration::Remap(remapped_path) => {
                 let name = format!("__with_name{}", self.with_name_counter);
                 self.with_name_counter += 1;
+                uwriteln!(
+                    self.src,
+                    "#[allow(unfulfilled_lint_expectations, unused_imports)]"
+                );
                 uwriteln!(self.src, "use {remapped_path} as {name};");
                 InterfaceName {
                     remapped: true,

tests/runtime/rust/with-only-affects-imports/test.rs

@@ -1,10 +1,5 @@
 //@ args = '--with my:inline/foo=other::my::inline::foo'
 
-#![expect(
-    unused_imports,
-    reason = "using `with` is known to produce possibly dead imports"
-)]
-
 include!(env!("BINDINGS"));
 
 mod other {