### Godot version

4.0 dev_build

### System information

Ubuntu 22.04.1

### Issue description

The "Lookup Symbol" button don't appears for custorm class names.
Related issues: #68475,  #73167.
I tried apply #68311, #69473 and #73196. It don't helps.
The `Ctrl+LMB` works right for all cases.

### Steps to reproduce

Right click to the `CustomClassA` symbol in the `custom_class_b.gd` anywhere. The `Lookup Symbol` button don't appears in the context menu.

### Minimal reproduction project

Example from  #68475.
if (EngineDebugger::is_active() && Thread::get_caller_id() == Thread::get_main_id()) {
		_debug_parse_err_line = -1;
		_debug_parse_err_file = "";
		_debug_error = p_error;
		bool is_error_breakpoint = p_error != "Breakpoint";
		EngineDebugger::get_script_debugger()->debug(this, p_allow_continue, is_error_breakpoint);
		return true;
	} else {
		return false;
	}
}
String GDScriptLanguage::debug_get_error() const {
	return _debug_error;
}
int GDScriptLanguage::debug_get_stack_level_count() const {
	if (_debug_parse_err_line >= 0) {
		return 1;
	}
	return _debug_call_stack_pos;
}
int GDScriptLanguage::debug_get_stack_level_line(int p_level) const {
	if (_debug_parse_err_line >= 0) {
		return _debug_parse_err_line;
	}
	ERR_FAIL_INDEX_V(p_level, _debug_call_stack_pos, -1);
	int l = _debug_call_stack_pos - p_level - 1;
	return *(_call_stack[l].line);
}
String GDScriptLanguage::debug_get_stack_level_function(int p_level) const {