[WIP][DO-NOT-MERGE][SPARK-51211][SS] Rename the option of readChangeFeed to readChangeLog in state store reader #49945
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What changes were proposed in this pull request?
This PR proposes to rename the option of readChangeFeed to readChangeLog in state store reader.
Why are the changes needed?
We realized that we did marketing of the feature for checkpointing only the update set as "changelog checkpointing". Since this option is dependent on the feature (when users use RocksDB state store provider, they should use changelog checkpointing to use this option), it'd be better to make the option be tightly related.
Does this PR introduce any user-facing change?
No, it's not released yet.
How was this patch tested?
Existing UTs.
Was this patch authored or co-authored using generative AI tooling?
No.