### Godot version

v4.0.beta13.official [caacade56]

### System information

Windows 8.1

### Issue description

The `Unreachable code (statement after return) in function 'function_name()'` warning is given for functions that do not have unreachable code. The same code does not give this warning in v3.5.stable.official [991bb6ac7].

### Steps to reproduce

```
func warning(i: int) -> void:
  if i == 0:
    pass
  elif i == 1:
    return
  else:
    return
  print("yeah")
```

Removing either the `elif` or the `else` removes the warning.

### Minimal reproduction project

N/A; code in reproduction steps can be placed in any blank gdscript file to trigger the error.
if (local.type != SuiteNode::Local::UNDEFINED) {
					String name;
					if (local.type == SuiteNode::Local::CONSTANT) {
						name = "constant";
					} else {
						name = "variable";
					}
					push_error(vformat(R"(There is already a %s named "%s" declared in this scope.)", name, constant->identifier->name), constant->identifier);
				}
				current_suite->add_local(constant, current_function);
				break;
			}
			default:
				break;
		}
	} while ((multiline || previous.type == GDScriptTokenizer::Token::SEMICOLON) && !check(GDScriptTokenizer::Token::DEDENT) && !lambda_ended && !is_at_end());
	complete_extents(suite);
	if (multiline) {
		if (!lambda_ended) {
			consume(GDScriptTokenizer::Token::DEDENT, vformat(R"(Missing unindent at the end of %s.)", p_context));
		} else {
			match(GDScriptTokenizer::Token::DEDENT);
		}
	} else if (previous.type == GDScriptTokenizer::Token::SEMICOLON) {
		consume(GDScriptTokenizer::Token::NEWLINE, vformat(R"(Expected newline after ";" at the end of %s.)", p_context));
	}
	if (p_for_lambda) {
		lambda_ended = true;
	}
	current_suite = suite->parent_block;