bug#68379: [resizepart] GPT table relocation during partition resizing

[bill-auger]

also FWIW:
> Main partition table begins at sector 2 and ends at sector 33
> First usable sector is 8224

one may also have expected that if the partition table were moved backward,
that the now unusable space from 34-8223 would have been reaped and now usable