(fix ci) search.cli: Fix journal client instantiation and add config checks

Prior to this commit, the import was no longer relevant (since journal v0.0.31).

This commit fixes the import (and bumps the journal requirements).

It also:

• adapts journal_client instantiation with the missing brokers, group_id, etc... (as a plain import change was not enough).
• adds configuration checks on the journal client (+ tests)

This fixes the current ci build failure [1]

• [1] https://jenkins.softwareheritage.org/job/DSEA/job/tests/260/console

Test Plan

tox

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Migrated from D3122 (view on Phabricator)