Change Details

``` Instead of having these be class static functions, just make them be standalone. Also removes WalletBatch::Recover which just passed through to BerkeleyBatch::Recover. ``` Partial backport (8/11) of core PR18918: https://github.com/bitcoin/bitcoin/pull/18918/commits/b426c7764d26e280e1f814cf36e050743c45cd12 Depends on D8594.

``` Instead of having these be class static functions, just make them be standalone. Also removes WalletBatch::Recover which just passed through to BerkeleyBatch::Recover. ``` Partial backport (8/11) of core [[https://github.com/bitcoin/bitcoin/pull/18918 | PR18918]]: https://github.com/bitcoin/bitcoin/pull/18918/commits/b426c7764d26e280e1f814cf36e050743c45cd12 Depends on D8594.

``` Instead of having these be class static functions, just make them be standalone. Also removes WalletBatch::Recover which just passed through to BerkeleyBatch::Recover. ``` Partial backport (8/11) of core [[https://github.com/bitcoin/bitcoin/pull/18918 | PR18918:]]: https://github.com/bitcoin/bitcoin/pull/18918/commits/b426c7764d26e280e1f814cf36e050743c45cd12 Depends on D8594.