add victoriamterics stack as telemetry storage

[dmitryk-dk]

1. Add VictoriaMetrics (metrics), VictoriaLogs (logs), and VictoriaTraces (traces) as three separate benchmark backends alongside Doris, ClickHouse, Druid, OceanBase, and Loki
2. Implement remote write ingestion (protobuf + snappy via new remote_write.py) for VictoriaMetrics metrics
3. Implement Loki-compatible push for VictoriaLogs and OTLP HTTP for VictoriaTraces via replay_victoriametrics.py
4. Add 14 VictoriaMetrics query files (LogsQL, MetricsQL, TraceQL) matching the 12 canonical SQL benchmarks
5. Add VictoriaMetrics stack to OTLP collector pipeline with per-signal exporters
6. Add docker-compose.victoriametrics.yml with healthchecks, make up-vm and make bench-vm targets

How to run:

1. make up-vm && make bench-vm — VM-only benchmark
2. make up-compare && make bench-compare — full comparison with all backends
3. make up-otel && make bench-otlp — OTLP ingestion including VM backends

Verify all three VM backends appear in ingestion, data volume, and query comparison tables