For NVMe SSDs, use native 4K (4096-byte) sectors if possible

For NVMe disks, we should use native 4K (4096-byte) sectors ("Advanced 4Kn Format") if possible; this gives a ~10% performance enhancement.

It seems that by default NVMe SSDs in FreeBSD are running in 512-byte sectors, which is not ideal:

```
Users-Laptop% sudo diskinfo -v /dev/nvme0ns1

/dev/nvme0ns1
512 # sectorsize
256060514304 # mediasize in bytes (238G)
500118192 # mediasize in sectors
0 # stripesize
0 # stripeoffset
No # TRIM/UNMAP support
Unknown # Rotation rate in RPM
```

This is for a [Transcend PCIe SSD 220S](https://www.transcend-info.com/Products/No-991), which "aims at high-end applications, such as digital audio/video production, gaming, and enterprise use".

How can we know whether a SSD supports native 4K sectors?
The [data sheet](https://cdn.transcend-info.com/products/images/modelpic/991/Transcend-PCIeSSD220S.pdf) doesn't specify sector size.

`smartctl` output ("SMART" in Hardware Probe) shows:

```
Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
0 + 512 0 0
```

Does this mean that this SSD will not support 4Kn?

In case it _did_ supoprt 4Kn, would we have to

```
sudo pkg install nvme-cli
nvmecontrol format --lbaf=1 /dev/XXX
zpool create -o ashift=12 ...
```

?

And how to tell __bsdinstall__ to do "the right thing"?

NOTE: `ashift=12` means that the pool is configured to use a 4K (4096-byte) sector size. In ZFS terminology, this is sometimes referred to as "ashift 12" or "4K alignment."

Why is all of this not happening automatically?

More information:

* Bits inside by René Rebe: [You DO NOT use your NVME SSDs to their BEST PERFORMANCE: THIS is the SIMPLE FIX!](https://www.youtube.com/watch?v=7f4f7BvmBqc)