wallettool: Have RecoverDatabaseFile return errors and warnings

Summary:
Instead of logging or printing these errors and warnings, return them to
the caller.

This is a backport of core#19457 [2/3]
https://github.com/bitcoin/bitcoin/pull/19457/commits/9f536d4fe949666f14a0bf5b814522cecde71f56

Depends on D9640

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D9641