Handle sector sizes

[vjr]

Addresses #177

Code stolen from #181 mostly.

[vjr]

This PR is mainly to enable the elementary OS installer to work with 4k sector disks and goes along with PR elementary/installer#621

[13r0ck]

Wasn't this already addressed by #266 and #273 ?

[vjr]

Wasn't this already addressed by #266 and #273 ?

Hello @13r0ck those were only partial or interim fixes just to handle sector sizes for checking the minimum required EFI partition size. This PR more fully addresses the issue and based on my rudimentary testing the elementary OS Installer now successful with the 3 main install options, custom, erase install unencrypted and erase install encrypted.

[vjr]

Hello s76 folks! @13r0ck @jackpot51

Is there anything you need from me to get this PR moving along?

Again, note that I'm a novice at Rust but will try to address any shortcomings in this PR as far as I can, although please feel free to add commits directly to expedite the process.

Thank you.

CC @davidmhewitt

[AKmatiAK]

Hi, I also have 4Kn disk and this pull request is important for me too as I can't install pop os on my HDD

[AKmatiAK]

Wasn't this already addressed by #266 and #273 ?

Looks like these fixes doesn't work, as if I understand well they're already in 22.04, but partition sizes are calculated to be 8 times smaller than in reality on my 4Kn drive.