Since crypto-js was
[discontinued](1da3dabf93),
[we migrated all our backend encryption to native
crypto](https://github.com/n8n-io/n8n/pull/7556).
However I decided back then to not remove crypto-js just yet in
expressions, as I wanted to use `SubtleCrypto`. Unfortunately for that
to work, we'd need to make expressions async.
So, to get rid of `crypto-js`, I propose this interim solution.
## Related tickets and issues
N8N-7020
## Review / Merge checklist
- [x] PR title and summary are descriptive
- [x] Tests included