Apache Spark - Docs refactoring (#2789)

* Split spark jdbc and native connector to separate files

* Update sidebars.js for spark to have collapsible doc pages

* Update docs/en/integrations/data-ingestion/apache-spark/spark-native-connector.md

Co-authored-by: Mikhail Shustov <[email protected]>

* Update docs/en/integrations/data-ingestion/apache-spark/spark-native-connector.md

Co-authored-by: Mikhail Shustov <[email protected]>

* update jdbc url to clickhouse jdbc docs

* remove redundant links

* add catalog config default values + indentation

* copy sbt example

* replace with correct write spark native connector examples

* correct spark sql example with native connector

* sharpen the sentence to include a compatability indication

* add the latest native connector version to the compatability matrix

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Co-authored-by: Mikhail Shustov <[email protected]>