perf: Make `PublicKey` decoding lazy inside WASM

[dima74]

Context

Fixes #5038

Solution

Make PublicKey decoding lazy inside WASM, since PublicKey in WASM is used mostly for comparison operations (==), and comparison can be performed without decoding (see #5038 for details). This givess approximatelly 400tps increase for single peer (from ~2450 to ~2850).

Review notes (optional)

Checklist

• [ ] I've read CONTRIBUTING.md.
• [ ] (optional) I've written unit tests for the code changes.
• [ ] All review comments have been resolved.
• [ ] All CI checks pass.

[dima74]

Looks like this PR would fail I2::Dev::Wasm workflow. Please review latest commit with the fix