Persist RLI index bootstrap records only if estimation is required and add unpersist #14068
Description
Bug Description
What happened:
During bootstrap, RLI index records are persisted for calculating the file group count. Users can configure the record index file group count by configuring the min and max file group count and setting them to the same value. In such a case, estimation is not required and therefore the record index records need not be persisted.
What you expected:
If the min and max file group count for record index is configured and set to the same value, record index records should not be persisted.
Steps to reproduce:
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Environment
Hudi version: master
Query engine: Spark
**Relevant Configs: **
hoodie.metadata.partitioned.record.index.min.filegroup.count
hoodie.metadata.partitioned.record.index.max.filegroup.count
hoodie.metadata.record.index.min.filegroup.count
hoodie.metadata.record.index.max.filegroup.count
Logs and Stack Trace
No response