### 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)

return true;
	} else if (p_constant->datatype == TYPE_UINT && p_to_type == TYPE_FLOAT) {
		if (p_value) {
			p_value->real = p_constant->values[0].uint;
		}
		return true;
	} else if (p_constant->datatype == TYPE_INT && p_to_type == TYPE_UINT) {
		if (p_constant->values[0].sint < 0) {
			return false;
		}
		if (p_value) {
			p_value->uint = p_constant->values[0].sint;
		}
		return true;
	} else if (p_constant->datatype == TYPE_UINT && p_to_type == TYPE_INT) {
		if (p_constant->values[0].uint > 0x7FFFFFFF) {
			return false;
		}
		if (p_value) {
			p_value->sint = p_constant->values[0].uint;
		}
		return true;
	} else {
		return false;
	}
}
bool ShaderLanguage::is_scalar_type(DataType p_type) {
	return p_type == TYPE_BOOL || p_type == TYPE_INT || p_type == TYPE_UINT || p_type == TYPE_FLOAT;
}
bool ShaderLanguage::is_float_type(DataType p_type) {