fix: resolve the inconsistent type issue in JsModule (#8939)

* fix: resolve the inconsistent type issue in JsModule

* fix: cargo cliipy

crates/node_binding/binding.d.ts

@@ -225,7 +225,7 @@ export declare class JsModule {
   get nameForCondition(): string | undefined
   get request(): string | undefined
   get userRequest(): string | undefined
-  set userRequest(val: string)
+  set userRequest(val: string | undefined)
   get rawRequest(): string | undefined
   get factoryMeta(): JsFactoryMeta | undefined
   get type(): string

crates/rspack_binding_values/src/module.rs

@@ -135,11 +135,15 @@ impl JsModule {
   }
 
   #[napi(setter)]
-  pub fn set_user_request(&mut self, val: String) -> napi::Result<()> {
-    let module: &mut dyn Module = self.as_mut()?;
-
-    if let Ok(normal_module) = module.try_as_normal_module_mut() {
-      *normal_module.user_request_mut() = val;
+  pub fn set_user_request(&mut self, val: Either<String, ()>) -> napi::Result<()> {
+    match val {
+      Either::A(val) => {
+        let module: &mut dyn Module = self.as_mut()?;
+        if let Ok(normal_module) = module.try_as_normal_module_mut() {
+          *normal_module.user_request_mut() = val;
+        }
+      }
+      Either::B(_) => {}
     }
     Ok(())
   }

packages/rspack/src/Module.ts

@@ -271,8 +271,10 @@ export class Module {
 				get(): string | undefined {
 					return module.userRequest;
 				},
-				set(val: string) {
-					module.userRequest = val;
+				set(val: string | undefined) {
+					if (val) {
+						module.userRequest = val;
+					}
 				}
 			},
 			rawRequest: {