🛠️ [TASK] : Update Catalyst Chain follower to utilise these new features

[stevenj]

Update Cardano Chain Follower to use this branch of our Pallas fork:
https://github.com/input-output-hk/catalyst-pallas/tree/feat/tx-metadata

And then use the new structs: MultiEraBlockWithRawAuxiliary and MultiEraTxWithRawAuxiliary.
See this PR for details: input-output-hk/catalyst-pallas#2