Add clickhouse_cpp bazel repository

[ddelnano]

Summary: Add clickhouse_cpp bazel repository

The k8sstormcenter project uses Pixie as a telemetry source (protocol tracing + dynamic tracing w/ bpftrace) for its security operations control, which complements the project’s existing detection and threat intelligence capabilities.

k8sstormcenter uses ClickHouse as its central forensic database, where telemetry from multiple security tools is aggregated and correlated. To better integrate Pixie into this architecture, the project extends Pixie with native ClickHouse support, allowing Pixie to:

• Read existing security and forensic data stored in ClickHouse.
• Correlate Pixie’s runtime telemetry with telemetry from other security data sources.
• Persist Pixie-generated telemetry and analysis results directly back into ClickHouse.

This is the first PR of a series that implements the functionality explained above.

Relevant Issues: N/A

Type of change: /kind dep

Test Plan: New bazel repository targets build