Adapt FG reader implementation for HFile format

[hudi-bot]

Since MDT is HFile based, and FG reader will serve as the central interface, therefore we want to support HFile based FG reader implementation.

 

Subtask 2, and 3 can be done concurrently.

JIRA info

• Link: https://issues.apache.org/jira/browse/HUDI-9234
• Type: Bug
• Fix version(s):
  • 1.1.0

[the-other-tim-brown]

This is completed as part of the 1.1.0 release