Etherlink: use the L2 caller's address in the fast withdrawal entrypoint

Context

Follow-up from !16417 (merged).

This MR adds the l2 caller address when emitting the event and creating the outbox message in the precompiled contract. The reason for that is just to be modular enough just in case we need it.

Manually testing the MR

dune exec etherlink/tezt/tests/main.exe -- evm deposit fast_withdraw /dal latest alpha --file evm_rollup.ml