fix(rust): Fixed Rust model files not matching module imports causing compiler errors

Author: ross-paypay

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java

@@ -538,6 +538,12 @@ public String modelFileFolder() {
         return (outputFolder + File.separator + modelFolder).replace("/", File.separator);
     }
 
+    @Override
+    public String modelFilename(String templateName, String modelName) {
+        String suffix = modelTemplateFiles().get(templateName);
+        return modelFileFolder() + File.separator + toModelFilename(modelName) + suffix;
+    }
+
     @Override
     public String apiDocFileFolder() {
         return (outputFolder + "/" + apiDocPath).replace('/', File.separatorChar);