There's a merged pull request on the void-packages repository

borg: update to 1.2.3.
https://github.com/void-linux/void-packages/pull/41699

Description:
#### Testing the changes
- I tested the changes in this PR: **briefly**

#### Local build testing
- I built this PR locally for my native architecture: **x86_64**

cc: @leahneukirchen 

Notes on the changes:
* use setuptools_scm for versioning instead of the manual hack
* switch to pyfuse3 from unmaintained llfuse as [recommended](https://github.com/borgbackup/borg/blob/1.2.3/setup.py#L77-L79)
* enable compiling the [hashindex extension](https://github.com/borgbackup/borg/blob/1.2.3/setup.py#L214)
* fix update file which was reporting NO VERSION