[ty] Simplify concise TypedDict invalid-key messages

Author: charliermarsh

crates/ty_python_semantic/resources/mdtest/comprehensions/basic.md

@@ -207,7 +207,7 @@ y3: list[Person] = [{"name": n} for n in ["Alice", "Bob"]]
 reveal_type(y3)  # revealed: list[Person]
 
 # error: [invalid-assignment]
-# error: [invalid-key] "Unknown key "misspelled" for TypedDict `Person`: Unknown key "misspelled""
+# error: [invalid-key] "Unknown key "misspelled" for TypedDict `Person`"
 # error: [missing-typed-dict-key] "Missing required key 'name' in TypedDict `Person` constructor"
 y4: list[Person] = [{"misspelled": n} for n in ["Alice", "Bob"]]
 ```

crates/ty_python_semantic/src/types/diagnostic.rs

@@ -4792,6 +4792,9 @@ pub(crate) fn report_invalid_key_on_typed_dict<'db>(
                     ));
                 } else {
                     diagnostic.set_primary_message(format_args!("Unknown key \"{key}\""));
+                    diagnostic.set_concise_message(format_args!(
+                        "Unknown key \"{key}\" for TypedDict `{typed_dict_name}`",
+                    ));
                 }
             }
             _ => {