gh-110481: Implement inter-thread queue for biased reference counting

[colesbury]

Biased reference counting maintains two refcount fields in each object: ob_ref_local and ob_ref_shared. The true refcount is the sum of these two fields. In some cases, when refcounting operations are split across threads,
the ob_ref_shared field can be negative (although the total refcount must be at least zero). In this case, the thread that decremented the refcount requests that the owning thread give up ownership and merge the refcount fields.

• Issue: Implement biased reference counting in --disable-gil builds #110481