Introduce more performant serializer for the spillable map of record index cache
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type:devtask
- Dominant language
- Java
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Description
### Task Description
Currently, `DefaultSerializer` is used for the `ExternalSpillableMap` inside the record index cache, and there is room for further optimization.
**What needs to be done:**
**Why this task is needed:**
### Task Type
Performance optimization
### Related Issues
**Parent feature issue:** (if applicable ) #17697
**Related issues:**
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