qemu: hotplug: Rename qemuDomainPrepareDisk to qemuHotplugPrepareDiskAccess
qemu: hotplug: Rename qemuDomainPrepareDisk to qemuHotplugPrepareDiskAccess

Match the prefix of the file and choose a name which better describes
what happens.

eskultety/libvirt,crobinso/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,nertpinx/libvirt,nertpinx/libvirt,nertpinx/libvirt,eskultety/libvirt,andreabolognani/libvirt,libvirt/libvirt,fabianfreyer/libvirt,olafhering/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,olafhering/libvirt,andreabolognani/libvirt,jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,jardasgit/libvirt,crobinso/libvirt,libvirt/libvirt,eskultety/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,olafhering/libvirt,libvirt/libvirt,crobinso/libvirt,jardasgit/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,jardasgit/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,zippy2/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt