[SPARK-44820] Switch languages consistently across docs for all code snippets

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4.1, 3.5.0
• Fix Version/s: 3.5.0, 4.0.0
• Component/s: Documentation
• Assignee: BingKun Pan
• Reporter: Allison Wang
• Created: 15/Aug/23 18:57
• Updated: 25/Sep/23 02:34
• Resolved: 25/Aug/23 00:49

Description

When a user chooses a different language for a code snippet, all code snippets on that page should switch to the chosen language. This was the behavior for, for example, Spark 2.0 doc: https://spark.apache.org/docs/2.0.0/structured-streaming-programming-guide.html

But it was broken for later docs, for example the Spark 3.4.1 doc: https://spark.apache.org/docs/latest/quick-start.html

We should fix this behavior change and possibly add test cases to prevent future regressions.