[S] Change in flashrom[main]: cli: Use flashrom_supported_programmers API in cli

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Dmitry Zhadinets, Peter Marheine.

Anastasia Klimchuk has posted comments on this change by Dmitry Zhadinets. ( https://review.coreboot.org/c/flashrom/+/87195?usp=email )

Change subject: cli: Use flashrom_supported_programmers API in cli
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Patch Set 2:

(1 comment)

Patchset:

PS2: 
I just thought about something, it's for the separate commit. I am writing here but it's for separate patch.
It would be great if you could add information about your new APIs (3 already submitted!) to our Recent development doc. We accumulate ongoing development between releases, so that people know what's going on and then it makes it easier to write release notes (and not forget anything).
Often it's included in the same patch, but it's fine to add later.

The doc is in `doc/release_notes/devel.rst` and it will be displayed here https://flashrom.org/release_notes/devel.html

Also a doc how to add docs https://flashrom.org/how_to_add_docs.html

Thank you so much!