irqbypass: Explicitly track producer and consumer bindings

irqbypass: Explicitly track producer and consumer bindings

Explicitly track IRQ bypass producer:consumer bindings.  This will allow
making removal an O(1) operation; searching through the list to find
information that is trivially tracked (and useful for debug) is wasteful.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Link: https://lore.kernel.org/r/20250516230734.2564775-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>