unbound ParamSpecs should be reported as invalid-type-arguments errors

Author: mtshiba

crates/ty_python_semantic/resources/mdtest/generics/legacy/paramspec.md

@@ -251,7 +251,7 @@ reveal_type(OnlyParamSpec[...]().attr)  # revealed: (...) -> None
 def func(c: Callable[P2, None]):
     reveal_type(OnlyParamSpec[P2]().attr)  # revealed: (**P2@func) -> None
 
-# error: [invalid-type-form] "ParamSpec `P2` is unbound"
+# error: [invalid-type-arguments] "ParamSpec `P2` is unbound"
 reveal_type(OnlyParamSpec[P2]().attr)  # revealed: (...) -> None
 
 # error: [invalid-type-arguments] "No type argument provided for required type variable `P1` of class `OnlyParamSpec`"
@@ -295,7 +295,7 @@ reveal_type(TypeVarAndParamSpec[int, [int, str]]().attr)  # revealed: (int, str,
 reveal_type(TypeVarAndParamSpec[int, [str]]().attr)  # revealed: (str, /) -> int
 reveal_type(TypeVarAndParamSpec[int, ...]().attr)  # revealed: (...) -> int
 
-# error: [invalid-type-form] "ParamSpec `P2` is unbound"
+# error: [invalid-type-arguments] "ParamSpec `P2` is unbound"
 reveal_type(TypeVarAndParamSpec[int, P2]().attr)  # revealed: (...) -> int
 # error: [invalid-type-arguments] "Type argument for `ParamSpec` must be either a list of types, `ParamSpec`, `Concatenate`, or `...`"
 reveal_type(TypeVarAndParamSpec[int, int]().attr)  # revealed: (...) -> int

crates/ty_python_semantic/src/types/infer/builder.rs

@@ -3531,7 +3531,7 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
                         if known_instance.class(self.db()) == KnownClass::ParamSpec =>
                     {
                         if let Some(diagnostic_builder) =
-                            self.context.report_lint(&INVALID_TYPE_FORM, expr)
+                            self.context.report_lint(&INVALID_TYPE_ARGUMENTS, expr)
                         {
                             diagnostic_builder.into_diagnostic(format_args!(
                                 "ParamSpec `{}` is unbound",