### 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 (uniform_scope == ShaderNode::Uniform::SCOPE_LOCAL) {
						tk = _get_token();
						if (tk.type != TK_UNIFORM) {
							_set_expected_after_error("uniform", "instance");
							return ERR_PARSE_ERROR;
						}
						uniform_scope = ShaderNode::Uniform::SCOPE_INSTANCE;
					}
				}
			};
				[[fallthrough]];
			case TK_UNIFORM:
			case TK_VARYING: {
				bool is_uniform = tk.type == TK_UNIFORM;
#ifdef DEBUG_ENABLED
				keyword_completion_context = CF_UNSPECIFIED;
#endif 
				if (!is_uniform) {
					if (shader_type_identifier == "particles" || shader_type_identifier == "sky" || shader_type_identifier == "fog") {
						_set_error(vformat(RTR("Varyings cannot be used in '%s' shaders."), shader_type_identifier));
						return ERR_PARSE_ERROR;
					}
				}
				DataPrecision precision = PRECISION_DEFAULT;
				DataInterpolation interpolation = INTERPOLATION_DEFAULT;
				DataType type;
				StringName name;
				int array_size = 0;
				tk = _get_token();
#ifdef DEBUG_ENABLED