Move constants inside OpFromGraph and remove unused inputs/outputs

[ricardoV94]

Description

If we only have on instance of the same OpFromGraph Op we should move constant inputs inside, to allow a simpler internal graph at compilation time.

We shoud also remove any unused inputs/outputs. This was already noted as a todo in the the docstrings:

pytensor/pytensor/compile/builders.py

Line 173 in 30b760f

- Add optimization to removing unused inputs/outputs