deny.toml: Ban direct dependecies on r-efi outside the SDK crate [Rebase & FF] - #1745

`r_efi::efi` is re-exported from `patina::standard::efi`, with the
guidance that code should depend on the re-export.

While r-efi is only an explicit crate dependency of the `patina`
crate today, it could inadvertently be added as a direct dependency
of other crates in the repo in the future.

This change adds a deny rule to the `deny.toml` file to prevent direct
dependencies on `r-efi` outside of the SDK crate.

This also allows tracking of transitive dependencies on `r-efi`.

Both `patina` and `getrandom` are allowed to depend on `r-efi` as
`getrandom` does so today used as follows by `patina_internal_core`:

```
warning[unmatched-wrapper]: direct parent 'getrandom = 0.4.3' of
banned crate 'r-efi = 6.0.0' was not marked as a wrapper
    ┌─ deny.toml:146:16
    │
146 │     { crate = "r-efi", reason = "Depend on `patina` and use `patina::standard::efi` instead of r-efi directly.", wrappers = ["patina"] }
    │                ━━━━━             ───────────────────────────────────────────────────────────────────────────── reason
    │                │
    │                banned here
    │
    ├ r-efi v6.0.0
      └── getrandom v0.4.3
          └── rand v0.10.2
              └── (dev) patina_internal_core v23.0.2
                  └── patina_dxe_core v23.0.2
                      ├── (dev) patina_adv_logger v23.0.2
```

A small touchup to arch.rs is made to use the re-exported path.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>