x86-assembly: generate/update .po files

[mhorne]

Summary

I am not sure that I've done this correctly.

I ran tools/update_translate_template.sh and discarded the irrelevant
changes.

[mhorne]

Rebase on top of content changes: D45962 and D45963.

[ziaee]

I don't really understand how the .po files work, @ebrandi usually regenerates them all at once every few months.

[carlavilla]

In D56430#1292349, @ziaee wrote:

I don't really understand how the .po files work, @ebrandi usually regenerates them all at once every few months.

The .po files are generated using po4a (https://www.po4a.org/), and then they load all of them to the weblate instance.
And when the translation is finished, they convert the .po files into .adoc using also po4a