epm play common: add get_github_release_info to retrieve GitHub release information (eterbug #18094)

- epm-release_upgrade: improvements for p11
- epm play pantum: fix download link (eterbug #18054)
- epm play freeoffice: fix url search mask (eterbug #17865)
- epm play onlyoffice: fix install with rpmbuild (eterbug #17982)
- epm update --content-index: fix rsync install (eterbug #17634)

- epm-addrepo: fix add Deffered repo
- distr_info: skip dnf requre
- epm pack skypeforlinux.sh: fix unsquashfs install
- po: improve messages
- epm-install: fix prefix parsing

- pack: ayugram: fix non-binding application to .desktop file in the GNOME Wayland session
- epm prescription wine: improve wow64 build for non ALT systems
- epm play libsciter-gtk: fix lib path and rename (ALT bug: 52924)
- epm play: rudesktop move to opt (eterbug #18004)
- epm-policy: add fatal for yum
- epm play mailspring: replace eget to get_github_url (eterbug #18012)
- epm repack vkteams: remove image format jp2 support (was via obsoleted libjasper)