### 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)

}
		}
		if (p_block) {
			if (p_block->block_type == BlockNode::BLOCK_TYPE_FOR_INIT && !is_var_init) {
				_set_error(RTR("The left expression is expected to be a variable declaration."));
				return ERR_PARSE_ERROR;
			}
			if (p_block->block_type == BlockNode::BLOCK_TYPE_FOR_CONDITION && !is_condition) {
				_set_error(RTR("The middle expression is expected to be a boolean operator."));
				return ERR_PARSE_ERROR;
			}
		}
		if (p_just_one) {
			break;
		}
	}
	return OK;
}
String ShaderLanguage::_get_shader_type_list(const HashSet<String> &p_shader_types) const {
	
	String valid_types;
	for (const String &E : p_shader_types) {
		if (!valid_types.is_empty()) {
			valid_types += ", ";
		}
		valid_types += "'" + E + "'";
	}
	return valid_types;
}
String ShaderLanguage::_get_qualifier_str(ArgumentQualifier p_qualifier) const {