### 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)

}
	} else {
		if (p_function_info.built_ins.has(p_identifier)) {
			if (r_data_type) {
				*r_data_type = p_function_info.built_ins[p_identifier].type;
			}
			if (r_is_const) {
				*r_is_const = p_function_info.built_ins[p_identifier].constant;
			}
			if (r_type) {
				*r_type = IDENTIFIER_BUILTIN_VAR;
			}
			return true;
		}
	}
	if (p_function_info.stage_functions.has(p_identifier)) {
		if (r_data_type) {
			*r_data_type = p_function_info.stage_functions[p_identifier].return_type;
		}
		if (r_is_const) {
			*r_is_const = true;
		}
		if (r_type) {
			*r_type = IDENTIFIER_FUNCTION;
		}
		return true;
	}
	FunctionNode *function = nullptr;
	while (p_block) {
		if (p_block->variables.has(p_identifier)) {