owut: activate by default in buildbot

owut: activate by default in buildbot

This will activate owut in buildbot builds for targets with large flash
by default. This will integrate it into most images by default.

The buildbots already build LuCI with luci-app-attendedsysupgrade. This
adds ucode-mod-uclient and owut to the image.

These are the package sizes for mips_24kc:
29270 bin/packages/mips_24kc/packages/owut-2026.01.13~2526d84b-r1.apk
 5449 bin/packages/mips_24kc/base/ucode-mod-uclient-2026.01.31~931bbfeb-r1.apk

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>