Database changes for Gloas

[StefanBratanov]

We need to store the execution payloads envelopes in Gloas to support syncing and potentially the state (depending on state management design).

[rolfyone]

might be a good time to stop storing the full execution payloads too...

[StefanBratanov]

might be a good time to stop storing the full execution payloads too...

We kind of need though to serve over RPC but they will be separate from the block, so that's good.