issue: https://github.com/milvus-io/milvus/issues/45525
see added README.md for added optimizations
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added query expression optimization feature with a new `optimizeExpr`
configuration flag to enable automatic simplification of filter
predicates, including range predicate optimization, merging of IN/NOT IN
conditions, and flattening of nested logical operators.
* **Bug Fixes**
* Adjusted delete operation behavior to correctly handle expression
evaluation.
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
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Signed-off-by: Buqian Zheng <zhengbuqian@gmail.com>
