[umbrella][Feature] Improve the performance of querying paimon table on spark

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/incubator-paimon/issues) and found nothing similar.

### Motivation

Improve the performance of querying paimon table on spark.

### Solution

_No response_

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

The issue identifies Spark queries against Paimon tables as the target but names no files, tests, entry points, or specific bottleneck. Start by locating the Spark query implementation and existing performance tests, then define a measurable baseline and acceptance criteria before choosing a change. Done should mean a demonstrated query-performance improvement with coverage or benchmark evidence.

Written by the indexing model from the issue text.