Resolve NXCALS-4043 "Avrodata datax converter"

Merge request template

COMPATIBILITY NOTE

Please make sure that this change is BACKWARDS COMPATIBLE and a new server will work correctly with clients using old APIs versions.

It may be that data sent in the new format will break the old clients.

In case of any potential incompatibility we have to inform our clients and schedule release & deployment with them.

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@acc-logging-team - please have a look for approval.

Add a Datax utility class that is a converter from AvroData (and avro) to ImmutableData (list of records). Changes a number of classes in the common and ingestion API but in a (supposedly) compatible way.

Closes NXCALS-4043