[BUG]: Metal Bind Group Pool Implementation

### Contact Details

_No response_

### What is the issue?

We forgot to implement the Metal backend pool! Please finish this. We aren't recycling the offsets in the argument buffer.

### How to reproduce?

NA.

### Platform

MacOS

### Graphics Backend

Metal

### Relevant log output

```shell

```

### Extension

Graphics

### Libraries

None

### System

None