### Godot version

v4.0.beta13.official [caacade56]

### System information

Linux Ubuntu 20.04 with Unity desktop

### Issue description

When calling an undefined function in the shader editor with argument(s), such as `undefined_function(1)`, the error reads:

> Too many arguments for "undefined_function()" call. Expected at most 0 but received 1.

instead of the expected:

> No matching function found for: 'undefined_function'.

This is possibly a regression introduced in https://github.com/godotengine/godot/issues/18225, since the latter was focused on the arguments part.

To avoid such regression in the future, consider adding a unit test with this case (and, in fact, unit tests for the other signature errors too if there are not already).

### Steps to reproduce

1. Create a shader resource and open the shader editor
2. Enter `undefined_function(1);` in the fragment() definition

### Minimal reproduction project

N/A
matches.insert(block->parent_function->arguments[i].name, ScriptLanguage::CODE_COMPLETION_KIND_VARIABLE);
							}
						}
						skip_function = block->parent_function->name;
					}
					block = block->parent_block;
				}
				if (comp_ident) {
					if (is_shader_inc) {
						for (int i = 0; i < RenderingServer::SHADER_MAX; i++) {
							const HashMap<StringName, ShaderLanguage::FunctionInfo> info = ShaderTypes::get_singleton()->get_functions(RenderingServer::ShaderMode(i));
							if (info.has("global")) {
								for (const KeyValue<StringName, BuiltInInfo> &E : info["global"].built_ins) {
									ScriptLanguage::CodeCompletionKind kind = ScriptLanguage::CODE_COMPLETION_KIND_MEMBER;
									if (E.value.constant) {
										kind = ScriptLanguage::CODE_COMPLETION_KIND_CONSTANT;
									}
									matches.insert(E.key, kind);
								}
							}
							if (info.has("constants")) {
								for (const KeyValue<StringName, BuiltInInfo> &E : info["constants"].built_ins) {
									ScriptLanguage::CodeCompletionKind kind = ScriptLanguage::CODE_COMPLETION_KIND_MEMBER;
									if (E.value.constant) {
										kind = ScriptLanguage::CODE_COMPLETION_KIND_CONSTANT;
									}
									matches.insert(E.key, kind);
								}
							}
							if (skip_function != StringName() && info.has(skip_function)) {