[Not for Merging] Add wasm contract support

[colmazia]

Not for merging, just a reference

Description

As discussed on discord, I open this pr of our version of implementing wasm contract support for hermes

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PR author checklist:

• Added changelog entry, using unclog.
• Added tests: integration (for Hermes) or unit/mock tests (for modules).
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[adizere]

FYI I gave this to a user who contacted us by email with the same problem as signalled in #2850 -- they expected to be able to relay based on events with hermes start but it wasn't working for them since their packets originated from CW contracts.

[ancazamfir]

Could you provide a github link or code snippet from a contract that emits the event with wasm module? Also add here some context from discord? Is this is for a Cosmos chain that uses the ibc-go handlers?

[colmazia]

@ancazamfir

• the "wasm" value in the message.module key is come from wasm module not from the contract.
  But if you want some contract example, you can go look at this
• I try to use it for BandChain which is the Cosmos chain that implement ibc-go