### 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)

HashMap<String, String> defined_modes;
	while (tk.type != TK_EOF) {
		switch (tk.type) {
			case TK_RENDER_MODE: {
#ifdef DEBUG_ENABLED
				keyword_completion_context = CF_UNSPECIFIED;
#endif 
				while (true) {
					StringName mode;
					_get_completable_identifier(nullptr, COMPLETION_RENDER_MODE, mode);
					if (mode == StringName()) {
						_set_error(RTR("Expected an identifier for render mode."));
						return ERR_PARSE_ERROR;
					}
					const String smode = String(mode);
					if (shader->render_modes.has(mode)) {
						_set_error(vformat(RTR("Duplicated render mode: '%s'."), smode));
						return ERR_PARSE_ERROR;
					}
					bool found = false;
					if (is_shader_inc) {
						for (int i = 0; i < RenderingServer::SHADER_MAX; i++) {
							const Vector<ModeInfo> modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(i));
							for (int j = 0; j < modes.size(); j++) {
								const ModeInfo &info = modes[j];
								const String name = String(info.name);
								if (smode.begins_with(name)) {
									if (!info.options.is_empty()) {
										if (info.options.has(smode.substr(name.length() + 1))) {
											found = true;