[java-client] doc updates for configuration

[chernser]

Summary

• configuration documentation update
• deprecation warning for client-v1

Closes ClickHouse/clickhouse-java#1884
Closes ClickHouse/clickhouse-java#1950
Closes

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/docusaurus.config.js
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/en/integrations/index.mdx