`sendmsg` fails with EFAULT in sending unix domain socket file descriptors

## Required information

**Operating system:**
Linux ubuntu:22.04

**Rust version:**
rustc 1.80.0 (051478957 2024-07-21)

**Cargo version:**
cargo 1.80.0 (376290515 2024-07-16)

**iceoryx2 version:**
`main` branch

**Observed result or behaviour:**

Everything was build for target `i686-unknown-linux-gnu`

The tests (`:
* unix_datagram_socket_sending_receiving_with_max_supported_fd_and_credentials_works (introduced with rust 1.71)
* unix_datagram_socket_sending_receiving_with_single_fd_works (introduced with rust 1.80)

fail in the `posix::sendmsg` call since it emits an `EFAULT`. Those errors where introduced whenever a new rust version was introduced.

**Expected result or behaviour:**
What do you expect to happen?

**Conditions where it occurred / Performed steps:**
```sh
cargo nextest run -p iceoryx2-bb-posix --target i686-unknown-linux-gnu --test unix_datagram_socket_tests sending_receiving_with_single_fd_works
```

Start with the posix::sendmsg call and the unix_datagram_socket_tests cases named in the issue, then reproduce the failure using the provided cargo nextest command for i686-unknown-linux-gnu. Done means the single-FD and maximum-supported-FD-and-credentials tests no longer fail with EFAULT.

Written by the indexing model from the issue text.