[ENSCORESW-767]. Made the number in ens-staging optional so we will pick up on the ens-staging alias

stable id lookup now also contains an archive_id_lookup table, which stores retired stable ids
also reduced the required memory
for release 74 and 66 species, it ran with less than 600Mb, no need to request 1.5G

Add 'HAP' to the list of types of patches to project so that the haplotypes sequence mappings and karyotype bands won't be missed again.

Fixes for the alt alleles code. We needed to make sure we used the right variables in the code. Also needed to make sure an array is actually defined during construction

Making consistent through plants species the use of ncRNA_EG source for maintaining ncRNA genes xrefs asscoiated with logic_name ncrna_eg

ChEMBL xrefs are now being imported

this works similarly to the stable_id_lookup table, but is populated with stable ids which are not current any more
the populate_stable_id_lookup.pl script has been updated to populate that table along with the other ones