graph, runtime: Add ethereum.decodeParams host function (#6649)

ethereum.decode decodes its input as a single ABI value, which fails for
calldata/event data whose top-level type is a tuple with a dynamic field
(e.g. Gnosis Safe execTransaction): such data is encoded as ABI function
parameters and has no leading offset word. Add ethereum.decodeParams,
which decodes via abi_decode_params, and gate it behind api version
0.0.10. ethereum.decode is left unchanged.

Fixes #5432