Support BPF dynamic pointers

### Describe the feature you'd like supported

Linux supports memory allocation, access, and release via helper functions.
```
struct bpf_dynptr_kern {
void *data;
u32 size;
u32 offset;
} __aligned(8);

/* Dynamically allocate memory */
bpf_dynptr_alloc(size, 0, &ptr);

/* Get a dynptr to __sk_buff data */
bpf_dynptr_from_skb(skb, &skb_ptr);

/* Get a dynptr to xdp_md data */
bpf_dynptr_from_xdp(ctx, &xdp_ptr);

/* Advance the ptr into skb->data */
bpf_dynptr_advance(&skb_ptr, sizeof(struct ethhdr));

/* Write into the memory */
bpf_dynptr_write(&ptr, 0, buf, sizeof(buf));

/* Release the memory allocation */
bpf_dynptr_put(&ptr);
```

References:
* [BPF: Dynamic pointers [LWN.net]](https://lwn.net/Articles/895885/)
* http://vger.kernel.org/bpfconf2022_material/lsfmmbpf2022-dynptr.pdf

Support is blocked on https://github.com/vbpf/ebpf-verifier/issues/273

### Proposed solution

Support the same helper functions that Linux supports

### Additional context

_No response_

Start by reviewing the linked verifier blocker, vbpf/ebpf-verifier#273, and the Linux dynamic-pointer helper behavior described in this issue. Identify the corresponding support boundary in ebpf-for-windows before implementing anything. Done means the Linux-supported dynamic-pointer helper functions listed here are supported and covered by suitable verification and behavior checks.

Written by the indexing model from the issue text.