### 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)

gui[1] = v.y;
					gui[2] = v.z;
				}
			}
		} break;
		case ShaderLanguage::TYPE_VEC4: {
			float *gui = (float *)data;
			if (p_array_size > 0) {
				if (value.get_type() == Variant::PACKED_COLOR_ARRAY) {
					const PackedColorArray &a = value;
					int s = a.size();
					for (int i = 0, j = 0; i < p_array_size; i++, j += 4) {
						if (i < s) {
							Color color = a[i];
							gui[j] = color.r;
							gui[j + 1] = color.g;
							gui[j + 2] = color.b;
							gui[j + 3] = color.a;
						} else {
							gui[j] = 0;
							gui[j + 1] = 0;
							gui[j + 2] = 0;
							gui[j + 3] = 0;
						}
					}
				} else {
					const PackedFloat32Array &a = value;
					int s = a.size();
					int count = 4 * p_array_size;
					for (int i = 0; i < count; i += 4) {