[HUDI-8335] Optimize the mor table filter push down when the file group contains only base file

[Zouxxyy]

Change Logs

For file groups without delta logs, we can make the following optimizations:
a) If the requested columns are not included in mandatoryColumns, they can be removed from requiredDataSchema.
b) Apply filters to reader for data skipping since no merging.

Impact

Optimize the performance of read mor table with file group contains only base file with filter

Risk level (write none, low medium or high below)

medium

Documentation Update

none

Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

[hudi-bot]

CI report:

• 5d68bc2 Azure: SUCCESS

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