Support secure connection to Clickhouse

[Somtom]

What problem does this PR solve

Our Clickhouse integration currently doesn't support secure connections

What changed

• Use clickhouse_connect library now to support secure connections
• Added a new environment variable

Checklist

• I added tests for new functionality if applicable
• I added an entry for changes to the unreleased changes of CHANGELOG.md
• I added documentation for new functionality if applicable
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes