Update all javadocs containing spark examples

[hudi-bot]

Lots of javadocs examples use spark 2 which is removed

JIRA info

• Link: https://issues.apache.org/jira/browse/HUDI-8294
• Type: Task
• Fix version(s):
  • 1.1.0

[yihua]

@CTTY could you help check this? Essentially, we should remove any code examples in javadocs or website pages that still use Spark 2, 3.0-3.2, whose support has been removed.