Use python 3.14 compatible counter value retrieval in get_current_compiled_fn_name

[rasmith]

Using copy(itertools.count()) results in a

TypeError: cannot pickle 'itertools.count' object

error in Python 3.14.

This PR makes it so that this operation is compatible with Python 3.14. The result of the evaluation is the same, even though
it doesn't look as nice.

>>> import itertools
>>> from copy import copy
>>> c = itertools.count()
>>> next(copy(c)) - 1
-1
>>> int(str(c).replace("count(","").replace(")","")) - 1
-1
>>>