### Tested versions

See "System information" below.

### System information

Godot v4.1.4.rc (2d3b2abcf) - Windows 10.0.19045 - Vulkan (Compatibility) - NVIDIA GeForce GTX 970 (NVIDIA; 31.0.15.2698) - Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (8 Threads)

### Issue description

POT generation ignores tr() expression in dictionaries:
```python
var strDeclarer = { 'N':tr("North"), 'E':tr("East"), 'S':tr("South"), 'W':tr("West") }[declarer]
var strVulnerable = { 0:tr("none"), 1:tr("both"), 2:tr("NS"), 3:tr("EW") }[vulnerable]
```
Strings as tr() parameters do not show up in the POT file.

### Steps to reproduce

FYI: [Creating the PO template - Automatic generation using the editor](https://docs.godotengine.org/en/stable/tutorials/i18n/localization_using_gettext.html#automatic-generation-using-the-editor)

### Minimal reproduction project (MRP)

N/A
const GDScriptParser::CallNode *call_node = static_cast<const GDScriptParser::CallNode *>(p_call->arguments[0]);
		if (call_node->arguments[0]->type == GDScriptParser::Node::ARRAY) {
			const GDScriptParser::ArrayNode *array_node = static_cast<const GDScriptParser::ArrayNode *>(call_node->arguments[0]);
			for (int i = 0; i < array_node->elements.size(); i++) {
				_extract_fd_constant_strings(array_node->elements[i]);
			}
		}
	}
	if (p_call->callee && p_call->callee->type == GDScriptParser::Node::SUBSCRIPT) {
		const GDScriptParser::SubscriptNode *subscript_node = static_cast<const GDScriptParser::SubscriptNode *>(p_call->callee);
		if (subscript_node->base && subscript_node->base->type == GDScriptParser::Node::CALL) {
			const GDScriptParser::CallNode *call_node = static_cast<const GDScriptParser::CallNode *>(subscript_node->base);
			_extract_from_call(call_node);
		}
	}
}
void GDScriptEditorTranslationParserPlugin::_extract_fd_constant_strings(const GDScriptParser::ExpressionNode *p_expression) {
	
	if (_is_constant_string(p_expression)) {
		String arg_val = p_expression->reduced_value;
		PackedStringArray arr = arg_val.split(";", true);
		if (arr.size() != 2) {
			ERR_PRINT("Argument for setting FileDialog has bad format.");
			return;
		}
		ids->push_back(arr[1].strip_edges());
	}
}
GDScriptEditorTranslationParserPlugin::GDScriptEditorTranslationParserPlugin() {