### Godot version

v4.0.beta17.official [c40020513]

### System information

Apple M1 Max - macOS Ventura 13.1 (22C65)

### Issue description

I am getting an error due to functions no longer returning the correct typed array, when the function concatenates arrays and returns it.

In other words, the following fails:

```
func add_arrays() -> Array[ClassA]:
	var array_1: Array[ClassA] = []
	var array_2: Array[ClassA] = []
	return array_1 + array_2
```

<img width="864" alt="Screenshot 2023-02-02 at 1 02 53 PM" src="https://user-images.githubusercontent.com/905216/216320503-475bf4a1-353e-455c-87d5-69d036db706c.png">

I'm assuming when concatenating, the typing changes to a generic `Array` now? Just a guess. 

### Steps to reproduce

N/A

### Minimal reproduction project

[Godot Crash Project.zip](https://github.com/godotengine/godot/files/10568780/Godot.Crash.Project.zip)

reduce_expression(p_assert->condition);
	if (p_assert->message != nullptr) {
		reduce_expression(p_assert->message);
		if (!p_assert->message->get_datatype().has_no_type() && (p_assert->message->get_datatype().kind != GDScriptParser::DataType::BUILTIN || p_assert->message->get_datatype().builtin_type != Variant::STRING)) {
			push_error(R"(Expected string for assert error message.)", p_assert->message);
		}
	}
	p_assert->set_datatype(p_assert->condition->get_datatype());
#ifdef DEBUG_ENABLED
	if (p_assert->condition->is_constant) {
		if (p_assert->condition->reduced_value.booleanize()) {
			parser->push_warning(p_assert->condition, GDScriptWarning::ASSERT_ALWAYS_TRUE);
		} else if (!(p_assert->condition->type == GDScriptParser::Node::LITERAL && static_cast<GDScriptParser::LiteralNode *>(p_assert->condition)->value.get_type() == Variant::BOOL)) {
			parser->push_warning(p_assert->condition, GDScriptWarning::ASSERT_ALWAYS_FALSE);
		}
	}
#endif
}
void GDScriptAnalyzer::resolve_match(GDScriptParser::MatchNode *p_match) {
	reduce_expression(p_match->test);
	for (int i = 0; i < p_match->branches.size(); i++) {
		resolve_match_branch(p_match->branches[i], p_match->test);
		decide_suite_type(p_match, p_match->branches[i]);
	}
}
void GDScriptAnalyzer::resolve_match_branch(GDScriptParser::MatchBranchNode *p_match_branch, GDScriptParser::ExpressionNode *p_match_test) {