### 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)

switch (p_type) {
		case TYPE_FLOAT:
		case TYPE_VEC2:
		case TYPE_VEC3:
		case TYPE_VEC4:
		case TYPE_MAT2:
		case TYPE_MAT3:
		case TYPE_MAT4:
		case TYPE_SAMPLER2D:
		case TYPE_SAMPLER2DARRAY:
		case TYPE_SAMPLER3D:
		case TYPE_SAMPLERCUBE:
		case TYPE_SAMPLERCUBEARRAY: {
			return true;
		}
		default: {
			return false;
		}
	}
}
bool ShaderLanguage::is_sampler_type(DataType p_type) {
	return p_type > TYPE_MAT4 && p_type < TYPE_STRUCT;
}
Variant ShaderLanguage::constant_value_to_variant(const Vector<ShaderLanguage::ConstantNode::Value> &p_value, DataType p_type, int p_array_size, ShaderLanguage::ShaderNode::Uniform::Hint p_hint) {
	int array_size = p_array_size;
	if (p_value.size() > 0) {
		Variant value;
		switch (p_type) {