[Chronik] Fixing sync issue between websocket.rs and chronik-clieint_websocket.py steps

Summary:
Made changes to re-sync the python steps with the rust steps.
The numbering on the python steps were also out (skipped from 5 -> 8), this has been fixed.
After this is landed, I will aim to get the failover approved.

Test Plan:
Please set BUILD_DIR env to export BUILD_DIR="/path/to/build_dir
UNIX: ./contrib/teamcity/build-configurations.py build-bitcoinsuite-chronik-client
run cargo test -- --nocapture in bitcoin-abc/modules/bitcoinsuite-chronik-client/tests

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D18336