Add simple E2E tests using a local Nibiru network versioned by commit hash or tag

[Unique-Divine]

The Ask

The goal is to specify an existing version of Nibiru by commit hash or tag, pull
the repo, git checkout to the specified commit, run just localnet to spin
up the network, and then run to simple tests:

• Implement simple sanity check with the base signing client that broadcasts a bank send transaction
• Implement simple sanity check with the Wasm signing client that uses the hello_world_counter contract and runs a smart query.

Purpose

This will help in testing against new versions of Nibiru much earlier in the
development cycle and prevent issues like #371 from surfacing for end users.