[monorepo, cashtab] Upgrade nodeJS in CI and apps

Summary:
I noticed Cashtab tests were passing with node 20 and failing with 22. The failure reasons include the (weird) issue of node 20 using 24:00:00 for midnight.

Anyway, we should always try to use the latest stable version.

So, bump node version in CI, update Cashtab tests to pass with node 22.

Test Plan: npm test

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D18466