### 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)

completion_class = TAG_GLOBAL;
	completion_struct = StringName();
	completion_base = TYPE_VOID;
	completion_base_array = false;
	include_positions.clear();
	include_positions.push_back(FilePosition());
#ifdef DEBUG_ENABLED
	keyword_completion_context = CF_UNSPECIFIED;
	used_constants.clear();
	used_varyings.clear();
	used_uniforms.clear();
	used_functions.clear();
	used_structs.clear();
	used_local_vars.clear();
	warnings.clear();
#endif 
	error_line = 0;
	tk_line = 1;
	char_idx = 0;
	error_set = false;
	error_str = "";
	is_const_decl = false;
	while (nodes) {
		Node *n = nodes;
		nodes = nodes->next;
		memdelete(n);
	}
}
#ifdef DEBUG_ENABLED
void ShaderLanguage::_parse_used_identifier(const StringName &p_identifier, IdentifierType p_type, const StringName &p_function) {