### Godot version

v4.0.rc1.official [8843d9ad3]

### System information

Lubuntu

### Issue description

You can't use + or += to mutate typed arrays.

It seems to be not correctly getting the type information from the second operand.

An erudite poster on the discord puts it differently:
> it's more like operator + doesn't retain Array typing
> the syntax for Array Concatenation via operators, but the idea gets across i think


The error you see is:
```Trying to assign an array of type "Array" to a variable of type "Array[int]".```


### Steps to reproduce

```
	var Alice: Array[int] = [1,2,3]
	var Bob: Array[int] = [4,5,6]
	Alice += Bob
```
This will crash with the above error message.

### Minimal reproduction project

[plus_syntax_broken_demo_project.zip](https://github.com/godotengine/godot/files/10694514/plus_syntax_broken_demo_project.zip)

GDScriptParser::DataType type;
	type.type_source = GDScriptParser::DataType::ANNOTATED_EXPLICIT;
	type.kind = GDScriptParser::DataType::BUILTIN;
	type.builtin_type = p_type;
	type.is_constant = true;
	type.is_meta_type = true;
	return type;
}
bool GDScriptAnalyzer::has_member_name_conflict_in_script_class(const StringName &p_member_name, const GDScriptParser::ClassNode *p_class, const GDScriptParser::Node *p_member) {
	if (p_class->members_indices.has(p_member_name)) {
		int index = p_class->members_indices[p_member_name];
		const GDScriptParser::ClassNode::Member *member = &p_class->members[index];
		if (member->type == GDScriptParser::ClassNode::Member::VARIABLE ||
				member->type == GDScriptParser::ClassNode::Member::CONSTANT ||
				member->type == GDScriptParser::ClassNode::Member::ENUM ||
				member->type == GDScriptParser::ClassNode::Member::ENUM_VALUE ||
				member->type == GDScriptParser::ClassNode::Member::CLASS ||
				member->type == GDScriptParser::ClassNode::Member::SIGNAL) {
			return true;
		}
		if (p_member->type != GDScriptParser::Node::FUNCTION && member->type == GDScriptParser::ClassNode::Member::FUNCTION) {
			return true;
		}
	}
	return false;
}
bool GDScriptAnalyzer::has_member_name_conflict_in_native_type(const StringName &p_member_name, const StringName &p_native_type_string) {