fix(cli): Use temporary wasm artifact_cache directory during validate command

[ktff]

Ref #3930

To avoid creating directories and caches in runtime directory we:

• create them in a tmp directory
• manually check original path

Open questions

• Is there a better way to modify wasm transform configuration than passing BuildMode around?

[ktff]

cc @Hoverbear

[Hoverbear]

So, I'm worried this work will be for nothing as we plan to migrate to wasmtime in the future which does not have the concept of an artifact cache (it's a JIT with a store like https://docs.rs/wasmtime/0.20.0/wasmtime/struct.Store.html, instead).

Do you think if we remove the artifact cache these new features in validate will be a worthwhile maintenance burden?

[ktff]

I was already on the edge if this fix is worth it, so if the issue will be resolved on it's own later, yea, this isn't worthy of maintenance. I'll see if there is some lighter(but hackier) fix, if not, I think we can leave it as it is since it has specific conditions of validate + different access group + wasm transform.

[ktff]

I don't see a lighter way to fix this than this PR, so I'll add a description/reasoning in the issue and close this.