### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

bool valid = false;
	DataType ret_type = TYPE_VOID;
	int ret_size = 0;
	switch (p_op->op) {
		case OP_EQUAL:
		case OP_NOT_EQUAL: {
			if ((!p_op->arguments[0]->is_indexed() && p_op->arguments[0]->get_array_size() > 0) || (!p_op->arguments[1]->is_indexed() && p_op->arguments[1]->get_array_size() > 0)) {
				break; 
			}
			DataType na = p_op->arguments[0]->get_datatype();
			DataType nb = p_op->arguments[1]->get_datatype();
			valid = na == nb;
			ret_type = TYPE_BOOL;
		} break;
		case OP_LESS:
		case OP_LESS_EQUAL:
		case OP_GREATER:
		case OP_GREATER_EQUAL: {
			if ((!p_op->arguments[0]->is_indexed() && p_op->arguments[0]->get_array_size() > 0) || (!p_op->arguments[1]->is_indexed() && p_op->arguments[1]->get_array_size() > 0)) {
				break; 
			}
			DataType na = p_op->arguments[0]->get_datatype();
			DataType nb = p_op->arguments[1]->get_datatype();
			valid = na == nb && (na == TYPE_UINT || na == TYPE_INT || na == TYPE_FLOAT);
			ret_type = TYPE_BOOL;
		} break;
		case OP_AND: