RedeemerTag for certificates is CERT rather than CERTIFICATE

[SCMusson]

Describe the bug Getting this error trying to build a registration and delegation stake transaction using a staking script:

pycardano.exception.TransactionBuilderException: Cannot find execution unit for redeemer: {
  'data': 0,
  'ex_units': {'mem': 0, 'steps': 0},
  'index': 1,
  'tag': {
    '__objclass__': <enum 'RedeemerTag'>,
    '_name_': 'CERT',
    '_sort_order_': 2,
    '_value_': 2,
  },
} in estimated execution units: {'certificate:1': {'mem': 36122, 'steps': 6633740}}

BlockFrostChainContext is the ChainContext I'm using here, I'm not sure if the backend will change things.

I'm guessing that blockfrost is using the tag name CERTIFICATE while pycardano is using CERT

Should RedeemerTag.CERT actually be RedeemerTag.CERTIFICATE or is there some compatibility code missing?

#312 It seems that reward/withdrawal tag was previously different as well.