[chronik] Apply the timeout factor to the chronik connections

Summary:
For the regular client but also the websocket connection (currently using the websocket default value). This will help avoiding timeouts when running on qemu.

Depends on D14776.

Test Plan:

./test/functional/test_runner.py chronik_*

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D14777