chore: fix inconsistent lifetimes

Notes: Multipart should be owned; normal request remains borrowed

Author: AlexandreCassagne

modules/openapi-generator/src/main/resources/rust-axum/server-operation.mustache

@@ -226,10 +226,10 @@ where
         {{/x-consumes-multipart}}
         {{/x-consumes-multipart-related}}
         {{#x-consumes-multipart}}
-          &body,
+          body,
         {{/x-consumes-multipart}}
         {{#x-consumes-multipart-related}}
-          &body,
+          body,
         {{/x-consumes-multipart-related}}
       {{/vendorExtensions}}
   ).await;