Map always serializes as definite length

[kylixafonso]

Good day! When trying to integrate Lucid Evolution to move away from the long unmaintained Lucid Cardano we stumbled upon a change in how maps are encoded by default. It seems this was caused by changes in CML rather than changes in Lucid Evolution and when reading through the code, I believe I've reached the conclusion that this is because PlutusMap is always encoded with its default LenEncoding of Canonical.