92f9ff5 Substantially revise the release process guide

Authored and Committed by adamwill a year ago
    Substantially revise the release process guide
    
    This contained quite a lot of outdated information and steps
    that were duplicated with the SOPs. This revises it to focus
    on a full release cycle workflow, mainly linking out to the
    release step SOPs, with a few remaining notes that don't fit
    anywhere else kept at the bottom.
    
    Note this entirely drops the notification of release-blocking
    deliverables for a release - it was only done for F31 and F32,
    and nobody seems to be missing it.
    
    This also removes some duplication between the No-Go SOP and
    the Release Delay SOP and has a few other small updates and
    cleanups.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>