[Task]: Deduplicate Coders

[Abacn]

What needs to happen?

There are a couple of V2 even V3 coders:

TimerDataCoderV2
MetadataCoderV2
TableDestinationCoderV2
TableDestinationCoderV3

created due to streaming update compatibility concerns. As a tech debt, we should deduplicate them for Beam 3.

Unfortunately we may preserve "V2/V3" suffix in class naming if it is possible to preserve upgrade compatibility, while deduping the (V1)/V2 classes

Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

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