Retag fix - rename btagIp_invalidIp

Since btagIp_invalidIp is not renamed, running retagging on newer samples errors as the variable cannot be overwritten. This fixes that problem by adding the variable to the addRenameMaps argument in the retag.py.

Please note that older FTAG1 derivations (including the currently recommended p5169) will still fail due to missing soft muon variables. These are now present in newer derivations (including the updated test file from p5488). Running retagging on older samples (e.g. p5169) requires some additional config changes, see here.

Tagging @fdibello who reported the issue.