Increase wasm max size

[maurolacy]

Required by over-sized babylon-contract, after latest rewards distribution functionality (babylonlabs-io/babylon-contract#96).

[maurolacy]

By the way, using the latest contract instantiation logic, this is failing silently with no error message AFAIK.

Only way to detect this that I found, was to list the contracts and notice babylon-contract was missing:

$ docker exec ibcsim-bcd bcd query wasm list-code -o json | jq -r .code_infos[].data_hash | while read H; do grep -i $H $(git rev-parse --show-toplevel)/../babylon-contract/artifacts/checksums.txt ; done
5:88b2ca0aa35cad63067817ce6ae28b05a4be74a16f586814b06b74f40028d4e0  btc_staking.wasm
3:4bba07dea4b28415d557af70a43ebe0db26f62662920b4edf67ebda05ec8d8d6  btc_finality.wasm
$

That, and a good deal of guessing and head scratching.

It would be very good to improve error handling in the SDK, so that these errors are not being swallowed along the way.
Update: Created #73 to track this.