[red-knot] Rename *_ty functions

[sharkdp]

Summary

General rules:

• Change the _ty suffix of all functions to _type.
• _type_and_qualifiers suffixes seem too long, so we ignore the existence of qualifiers and still speak of "types"
• Functions only have a _type suffix if they return either Type, Option<Type>, or TypeAndQualifiers

Free functions:

• binding_ty => binding_type
• declaration_ty => declaration_type
• definition_expression_ty => definition_expression_type

Methods:

• CallDunderResult::return_ty => return_type
• NotCallableError::return_ty => return_type
• NotCallableError::called_ty => called_type
• TypeAndQualifiers::inner_ty => inner_type
• TypeAliasType::value_ty => value_type
• TypeInference::expression_ty => expression_type
• TypeInference::try_expression_ty => try_expression_type
• TypeInference::binding_ty => binding_type
• TypeInference::declaration_ty => declaration_type
• TypeInferenceBuilder::expression_ty => expression_type
• TypeInferenceBuilder::file_expression_ty => file_expression_type
• TypeInferenceBuilder::module_ty_from_name => module_type_from_name
• ClassBase::try_from_ty => try_from_type
• Parameter::annotated_ty => annotated_type
• Parameter::default_ty => default_type
• CallOutcome::return_ty => return_type
• CallOutcome::return_ty_result => return_type_result
• CallBinding::from_return_ty => from_return_type
• CallBinding::set_return_ty => set_return_type
• CallBinding::return_ty => return_type
• CallBinding::parameter_tys => parameter_types
• CallBinding::one_parameter_ty => one_parameter_type
• CallBinding::two_parameter_tys => two_parameter_types
• Unpacker::tuple_ty_elements => tuple_type_elements
• StringPartsCollector::ty => string_type

Traits

• HasTy => HasType
• HasTy::ty => inferred_type

Test functions:

• assert_public_ty => assert_public_type
• assert_scope_ty => assert_scope_type

closes #15569

Test Plan

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