[repository] Drop type_and_source_from_eid and rename related cache
We don't want to handle anymore the entities.asource column so we shouldn't use
those anymore. Also rename repository's _type_source_cache into
_type_extid_cache as this is what it's containing now.
Do similar renaming to the system source API.
Related to #15538288
from os import unlink
from os.path import isfile, join
from cubicweb.cwconfig import CubicWebConfiguration as cwcfg
regdir = cwcfg.instances_dir()
if isfile(join(regdir, 'startorder')):
if confirm('The startorder file is not used anymore in Cubicweb 3.22. '
'Should I delete it?',
shell=False, pdb=False):
unlink(join(regdir, 'startorder'))