Upgrade to wasmer 5.0.0

[sug0]

Describe your changes

• Upgrade to wasmer v5.0.0 (see: https://wasmer.io/posts/introducing-wasmer-v5)
• Introduce an option to run integration tests with wasmer's interpreter mode, introduced in v5.0.0
  • Add code supporting the interpreter mode, hidden under a feature flag
  • Add new makefile target, for instance make test-integration-wasmi, to run the integration tests with the wasm interpreter (rather than the JIT engine)

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

[sug0]

To satisfy the second objective, consult: https://github.com/wasmerio/wasmer/blob/v5.0.0/lib/api/Cargo.toml