### Godot version

Godot 4.0.1.stable

### System information

Windows 10, Forward+

### Issue description

Example code:

```gdscript
@warning_ignore("shadowed_global_identifier")
static func print_debug(msg: String):
```

the warning is ignored by pressing [ignore] in the warnings panel.

pressing it multiple times results in:
```gdscript
@warning_ignore("shadowed_global_identifier", "shadowed_global_identifier")
```


### Steps to reproduce

Shadowing a global function with a method of script:

```gdscript
@warning_ignore("shadowed_global_identifier")
static func print_debug(msg: String):
```


### Minimal reproduction project

```gdscript
@warning_ignore("shadowed_global_identifier")
static func print_debug(msg: String):
    pass
```
if (p_subscript->base == nullptr || p_subscript->index == nullptr) {
		return Variant();
	}
	bool is_base_value_reduced = false;
	Variant base_value = make_expression_reduced_value(p_subscript->base, is_base_value_reduced);
	if (!is_base_value_reduced) {
		return Variant();
	}
	if (p_subscript->is_attribute) {
		bool is_valid = false;
		Variant value = base_value.get_named(p_subscript->attribute->name, is_valid);
		if (is_valid) {
			is_reduced = true;
			return value;
		} else {
			return Variant();
		}
	} else {
		bool is_index_value_reduced = false;
		Variant index_value = make_expression_reduced_value(p_subscript->index, is_index_value_reduced);
		if (!is_index_value_reduced) {
			return Variant();
		}