### 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
```
p_source = p_function;
	}
	StringName function_name = p_function->identifier != nullptr ? p_function->identifier->name : StringName();
	if (p_function->get_datatype().is_resolving()) {
		push_error(vformat(R"(Could not resolve function "%s": Cyclic reference.)", function_name), p_source);
		return;
	}
	if (p_function->resolved_signature) {
		return;
	}
	p_function->resolved_signature = true;
#ifdef DEBUG_ENABLED
	HashSet<GDScriptWarning::Code> previously_ignored_warnings = parser->ignored_warnings;
	for (GDScriptWarning::Code ignored_warning : p_function->ignored_warnings) {
		parser->ignored_warnings.insert(ignored_warning);
	}
#endif
	GDScriptParser::FunctionNode *previous_function = parser->current_function;
	parser->current_function = p_function;
	bool previous_static_context = static_context;
	static_context = p_function->is_static;
	GDScriptParser::DataType prev_datatype = p_function->get_datatype();
	GDScriptParser::DataType resolving_datatype;
	resolving_datatype.kind = GDScriptParser::DataType::RESOLVING;
	p_function->set_datatype(resolving_datatype);
#ifdef TOOLS_ENABLED
	int default_value_count = 0;
#endif 
	for (int i = 0; i < p_function->parameters.size(); i++) {
		resolve_parameter(p_function->parameters[i]);