### 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)

for (const MethodInfo &info : constructors) {
					if (p_call->arguments.size() < info.arguments.size() - info.default_arguments.size()) {
						continue;
					}
					if (p_call->arguments.size() > info.arguments.size()) {
						continue;
					}
					bool types_match = true;
					for (int i = 0; i < p_call->arguments.size(); i++) {
						GDScriptParser::DataType par_type = type_from_property(info.arguments[i], true);
						if (!is_type_compatible(par_type, p_call->arguments[i]->get_datatype(), true)) {
							types_match = false;
							break;
#ifdef DEBUG_ENABLED
						} else {
							if (par_type.builtin_type == Variant::INT && p_call->arguments[i]->get_datatype().builtin_type == Variant::FLOAT && builtin_type != Variant::INT) {
								parser->push_warning(p_call, GDScriptWarning::NARROWING_CONVERSION, p_call->function_name);
							}
#endif
						}
					}
					if (types_match) {
						for (int i = 0; i < p_call->arguments.size(); i++) {
							if (p_call->arguments[i]->is_constant) {
								update_const_expression_builtin_type(p_call->arguments[i], type_from_property(info.arguments[i], true), "pass");
							}
						}
						match = true;
						call_type = type_from_property(info.return_val);
						break;