### 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)

default:
									break;
							}
							if (((new_filter != FILTER_DEFAULT || new_repeat != REPEAT_DEFAULT) || (new_hint != ShaderNode::Uniform::HINT_NONE && new_hint != ShaderNode::Uniform::HINT_SOURCE_COLOR && new_hint != ShaderNode::Uniform::HINT_RANGE)) && !is_sampler_type(type)) {
								_set_error(RTR("This hint is only for sampler types."));
								return ERR_PARSE_ERROR;
							}
							if (new_hint != ShaderNode::Uniform::HINT_NONE) {
								if (uniform.hint != ShaderNode::Uniform::HINT_NONE) {
									if (uniform.hint == new_hint) {
										_set_error(vformat(RTR("Duplicated hint: '%s'."), get_uniform_hint_name(new_hint)));
									} else {
										_set_error(vformat(RTR("Redefinition of hint: '%s'. The hint has already been set to '%s'."), get_uniform_hint_name(new_hint), get_uniform_hint_name(uniform.hint)));
									}
									return ERR_PARSE_ERROR;
								} else {
									uniform.hint = new_hint;
									current_uniform_hint = new_hint;
								}
							}
							if (new_filter != FILTER_DEFAULT) {
								if (uniform.filter != FILTER_DEFAULT) {
									if (uniform.filter == new_filter) {
										_set_error(vformat(RTR("Duplicated filter mode: '%s'."), get_texture_filter_name(new_filter)));
									} else {
										_set_error(vformat(RTR("Redefinition of filter mode: '%s'. The filter mode has already been set to '%s'."), get_texture_filter_name(new_filter), get_texture_filter_name(uniform.filter)));
									}
									return ERR_PARSE_ERROR;
								} else {
									uniform.filter = new_filter;