### 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 {
										new_hint = ShaderNode::Uniform::HINT_SOURCE_COLOR;
									}
								} break;
								case TK_HINT_DEFAULT_BLACK_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_DEFAULT_BLACK;
								} break;
								case TK_HINT_DEFAULT_WHITE_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_DEFAULT_WHITE;
								} break;
								case TK_HINT_DEFAULT_TRANSPARENT_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_DEFAULT_TRANSPARENT;
								} break;
								case TK_HINT_NORMAL_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_NORMAL;
								} break;
								case TK_HINT_ROUGHNESS_NORMAL_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_ROUGHNESS_NORMAL;
								} break;
								case TK_HINT_ROUGHNESS_R: {
									new_hint = ShaderNode::Uniform::HINT_ROUGHNESS_R;
								} break;
								case TK_HINT_ROUGHNESS_G: {
									new_hint = ShaderNode::Uniform::HINT_ROUGHNESS_G;
								} break;
								case TK_HINT_ROUGHNESS_B: {
									new_hint = ShaderNode::Uniform::HINT_ROUGHNESS_B;
								} break;
								case TK_HINT_ROUGHNESS_A: {
									new_hint = ShaderNode::Uniform::HINT_ROUGHNESS_A;