chore!: BREAKING CHANGE: remove sqlite from telemetry config (#3808)

# What does this PR do?
- Removed sqlite sink from telemetry config.
- Removed related code
- Updated doc related to telemetry

## Test Plan
CI

llama_stack/distributions/starter-gpu/run.yaml

@@ -159,8 +159,7 @@ providers:
     provider_type: inline::meta-reference
     config:
       service_name: "${env.OTEL_SERVICE_NAME:=\u200B}"
-      sinks: ${env.TELEMETRY_SINKS:=sqlite}
-      sqlite_db_path: ${env.SQLITE_STORE_DIR:=~/.llama/distributions/starter-gpu}/trace_store.db
+      sinks: ${env.TELEMETRY_SINKS:=}
       otel_exporter_otlp_endpoint: ${env.OTEL_EXPORTER_OTLP_ENDPOINT:=}
   post_training:
   - provider_id: huggingface-gpu