### 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)

}
			return OK;
		} else if (tk.type == TK_CONST || is_token_precision(tk.type) || is_token_nonvoid_datatype(tk.type) || is_struct) {
			is_var_init = true;
			String struct_name = "";
			if (is_struct) {
				struct_name = tk.text;
#ifdef DEBUG_ENABLED
				if (check_warnings && HAS_WARNING(ShaderWarning::UNUSED_STRUCT_FLAG) && used_structs.has(struct_name)) {
					used_structs[struct_name].used = true;
				}
#endif 
			}
#ifdef DEBUG_ENABLED
			uint32_t precision_flag = CF_PRECISION_MODIFIER;
			keyword_completion_context = CF_DATATYPE;
			if (!is_token_precision(tk.type)) {
				if (!is_struct) {
					keyword_completion_context |= precision_flag;
				}
			}
#endif 
			bool is_const = false;
			if (tk.type == TK_CONST) {
				is_const = true;
				tk = _get_token();
				if (!is_struct) {
					is_struct = shader->structs.has(tk.text); 
					struct_name = tk.text;
				}