### 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.
AssertNode *assert = alloc_node<AssertNode>();
	push_multiline(true);
	consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after "assert".)");
	assert->condition = parse_expression(false);
	if (assert->condition == nullptr) {
		push_error("Expected expression to assert.");
		pop_multiline();
		complete_extents(assert);
		return nullptr;
	}
	if (match(GDScriptTokenizer::Token::COMMA) && !check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
		assert->message = parse_expression(false);
		if (assert->message == nullptr) {
			push_error(R"(Expected error message for assert after ",".)");
			pop_multiline();
			complete_extents(assert);
			return nullptr;
		}
		match(GDScriptTokenizer::Token::COMMA);
	}
	pop_multiline();
	consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after assert expression.)*");
	complete_extents(assert);
	end_statement(R"("assert")");
	return assert;
}
GDScriptParser::BreakNode *GDScriptParser::parse_break() {