[chronik] Disable the Write Ahead Log for rocksdb

Summary:
We don't need the feature, and it doesn't play nicely with qemu.

Depends on D14983.

Test Plan:
With chronik:

ninja check-functional

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D14815