[Chronik] Don't ignore SLP and ALP mixups when parsing

Summary:
Users may accidentally use SLP in eMPP, or forget to use OP_RESERVED when using ALP, both of which currently silently get ignored when parsing.

However, it would be more helpful to return an error in this case so they know exactly what went wrong.

Test Plan: cargo test -p bitcoinsuite-slp

Reviewers: Fabien, #bitcoin_abc

Reviewed By: Fabien, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D15030