minimum supported JDK version to run Error Prone is JDK 21 as of Error Prone 2.43.0

### Expected Behavior

use Error Prone 2.43.0.

related might later on use:
- https://docs.openrewrite.org/recipes/java/migrate/upgradetojava21
- https://github.com/checkstyle/checkstyle/blob/0500cab4436f0b2759f5797800ef3e0073454a69/rewrite.yml#L15
- https://github.com/diffplug/spotless/pull/2756

### Current Behavior (optional)

_No response_

### Context

- https://github.com/google/error-prone/issues/5365
- https://github.com/gradle/gradle/issues/35768
- https://github.com/diffplug/spotless/issues/2755

首先检查仓库当前的 Error Prone 配置以及相关的 Gradle 构建文件；该 issue 未指定具体文件。将所需的 JDK 21 基线与 Error Prone 2.43.0 进行比较，并审查链接的 upstream 参考资料。完成的标准是项目使用 Error Prone 2.43.0，并且现有检查仍与 JDK 21 兼容。

由索引模型根据 Issue 内容生成。