Cache scalar cython functions

[ricardoV94]

Description

#1807 enabled this functionality for lapack functions. We should do it also for scalar functions (like psi), defined here:

pytensor/pytensor/link/numba/dispatch/scalar.py

Lines 75 to 77 in 7cd524c

	scalar_func_numba = wrap_cython_function(
	cython_func, output_dtype, input_dtypes
	)