refactor: use runtime env in ibc 08-wasm client module

[damiannolan]

Description

This PR is work-in-progress and should not be merged until completed.

The usage of sdk.Context should try to be removed completely.
The 08-wasm module is still relying on sdk.Context in the keeper for gas consumption.
This can be refactored out and replaced by k.GasService.

The usage of the legacy baseapp GRPCQueryRouter for the 08-wasm Querier should also try to be replaced by adding the new query router to the runtime environment using runtime.EnvWithQueryRouterService(app.GRPCQueryRouter()).

Main tasks left to complete:

• Migrate the GasRegister to use GasService in favour of sdk.Context.
• Refactor the Querier to use the runtime query router.

ref: #7712

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