[Task]: Add sector size support to partitioning for UFS

[HeyMeco]

Task description

While working on Radxa Nio 12L support which uses 4096 byte native storage via UFS I noticed just setting offset isn’t enough as the build system always defaults to 512 byte's with the included sfdisk from the docker image.

• Find a solution to have --sector-size enabled for sfdisk in our build process which is a thing in newer versions. (See https://man7.org/linux/man-pages/man8/sfdisk.8.html)
• Update partitioning.sh to make use of sector sizes in sfdisk and losetup
• Add documentation for sector size env variable

[github-actions]

Jira ticket: AR-2629

[HeyMeco]

Support for the --sector-size command is implemented after util-linux 2.42… which is apparently still in development judging by the tag 2.42-start.

[amazingfate]

2.41-rc1 has included it, packaged in debian experimental: https://packages.debian.org/source/experimental/util-linux

[HeyMeco]

We could try and see if manually installing 2.41 to the docker image introduces any bugs in our build process?

[HeyMeco]

Need to test it out but it's likely this PR for Qualcomm #8053 could fix this for Mediatek too

• Test and confirm (4k Alignement isn't enough, sector sizes need to be 4k for UFS to boot)