### 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)

return *VariantGetInternalPtr<bool>::get_ptr(p_ptr);
}
_FORCE_INLINE_ static bool _operate_get_int(const Variant *p_ptr) {
	return *VariantGetInternalPtr<int64_t>::get_ptr(p_ptr) != 0;
}
_FORCE_INLINE_ static bool _operate_get_float(const Variant *p_ptr) {
	return *VariantGetInternalPtr<double>::get_ptr(p_ptr) != 0.0;
}
_FORCE_INLINE_ static bool _operate_get_object(const Variant *p_ptr) {
	return p_ptr->get_validated_object() != nullptr;
}
_FORCE_INLINE_ static bool _operate_get_ptr_nil(const void *p_ptr) {
	return false;
}
_FORCE_INLINE_ static bool _operate_get_ptr_bool(const void *p_ptr) {
	return PtrToArg<bool>::convert(p_ptr);
}
_FORCE_INLINE_ static bool _operate_get_ptr_int(const void *p_ptr) {
	return PtrToArg<int64_t>::convert(p_ptr) != 0;
}
_FORCE_INLINE_ static bool _operate_get_ptr_float(const void *p_ptr) {
	return PtrToArg<double>::convert(p_ptr) != 0.0;
}
_FORCE_INLINE_ static bool _operate_get_ptr_object(const void *p_ptr) {
	return PtrToArg<Object *>::convert(p_ptr) != nullptr;
}
#define OP_EVALUATOR(m_class_name, m_left, m_right, m_op)                                                                    \
	class m_class_name {                                                                                                     \
	public:                                                                                                                  \