emulators/qemu7: Update version 7.0.0=>7.2.1
Merge the relevant port files from emulators/qemu. This is most probably
going to be the last version update untill Qemu releases version 9 and
we phase this out.
(Only the first 10 of 30 ports in this commit are shown above. )
emulators/qemu7*: Move qemu70 to qemu7
QEMU 7.X.X branch is reaching EOL as the upstream has released 8.X.X
branch. So there is no point in keeping multiple versions from 7.X.X
series. This is an interim commit to prepare to move emulators/qemu to
emulators/qemu7 so that emulators/qemu can be upgraded to latest 8.X.X
release.