### 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
}
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_CONST_KEYWORD | CF_FUNC_DECL_PARAM_SPEC | CF_PRECISION_MODIFIER | CF_FUNC_DECL_PARAM_TYPE; 
					if (_lookup_next(next)) {
						if (next.type == TK_CONST) {
							keyword_completion_context = CF_UNSPECIFIED;
						} else if (is_token_arg_qual(next.type)) {
							keyword_completion_context = CF_CONST_KEYWORD;
						} else if (is_token_precision(next.type)) {
							keyword_completion_context = (CF_CONST_KEYWORD | CF_FUNC_DECL_PARAM_SPEC | CF_FUNC_DECL_PARAM_TYPE);
						} else if (is_token_datatype(next.type)) {
							keyword_completion_context = (CF_CONST_KEYWORD | CF_FUNC_DECL_PARAM_SPEC | CF_PRECISION_MODIFIER);
						}
					}
#endif 
					bool param_is_const = false;
					if (tk.type == TK_CONST) {
						param_is_const = true;
						tk = _get_token();
#ifdef DEBUG_ENABLED
						if (keyword_completion_context & CF_CONST_KEYWORD) {
							keyword_completion_context ^= CF_CONST_KEYWORD;
						}
						if (_lookup_next(next)) {
							if (is_token_arg_qual(next.type)) {
								keyword_completion_context = CF_UNSPECIFIED;
							} else if (is_token_precision(next.type)) {
								keyword_completion_context = (CF_FUNC_DECL_PARAM_SPEC | CF_FUNC_DECL_PARAM_TYPE);
							} else if (is_token_datatype(next.type)) {
								keyword_completion_context = (CF_FUNC_DECL_PARAM_SPEC | CF_PRECISION_MODIFIER);