Drop intrinsic configuration and activate it always

[felixhekhorn]

IC can be always active and the decision of whether to use it or not left to the user upon PDF convolution;

I think the only affected line (apart from passing the config around) is this one:

yadism/src/yadism/coefficient_functions/__init__.py

Lines 134 to 145 in c06562d

	if sfh in self.intrinsic: # heavy quark is intrinsic
	if "FFN0" in self.scheme:
	heavy_comps[sfh].extend(
	asy.kernels.generate_intrinsic_asy(
	self.esf, nf, self.esf.info.theory["pto_evol"], ihq=sfh
	),
	)
	else:
	heavy_comps[sfh].extend(
	intrinsic.kernels.generate(self.esf, ihq=sfh)
	)

which we de-indent and finish.

EKO counterpart is done in NNPDF/eko#295