### 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)

}
			DataPrecision precision = PRECISION_DEFAULT;
			if (is_token_precision(tk.type)) {
				precision = get_token_precision(tk.type);
				tk = _get_token();
				if (!is_struct) {
					is_struct = shader->structs.has(tk.text); 
				}
#ifdef DEBUG_ENABLED
				if (keyword_completion_context & precision_flag) {
					keyword_completion_context ^= precision_flag;
				}
#endif 
			}
#ifdef DEBUG_ENABLED
			if (is_const && _lookup_next(next)) {
				if (is_token_precision(next.type)) {
					keyword_completion_context = CF_UNSPECIFIED;
				}
				if (is_token_datatype(next.type)) {
					keyword_completion_context ^= CF_DATATYPE;
				}
			}
#endif 
			if (precision != PRECISION_DEFAULT) {
				if (!is_token_nonvoid_datatype(tk.type)) {
					_set_error(RTR("Expected variable type after precision modifier."));
					return ERR_PARSE_ERROR;
				}
			}