introduce wasm light clients

[aeryz]

Closes: #XXX

What is the purpose of the change

Introduces the ibc wasm light clients module as we discussed in the telegram chat. There are a few notable parts:

1. Although the ibc wasm light client module is capable of sharing the vm with x/wasm, we chose to go with a separate path in order to fully separate regular cosmwasm with light clients. See juno's recent post mortum for an example.
2. When you compare the reference implementation and the code here, you'll see that they assign the DataDir without the home prefix but this will be fixed with this PR.

Testing and Verifying

We had to change the parallel tests to run sequential since the wasm light client module is using a global store key. This will not be necessary once we upgrade to ibc v8/sdk 0.50.

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes?
• Changelog entry added to Unreleased section of CHANGELOG.md?

Where is the change documented?

• Specification (x/{module}/README.md)
• Osmosis documentation site
• Code comments?
• N/A

[mergify]

⚠️ The sha of the head commit of this PR conflicts with #7637. Mergify cannot evaluate rules on this PR. ⚠️

[nicolaslara]

closing this PR in favour of #7637 to avoid CI from going crazy.