test: Add additional test coverage for `OpenSearchAiSearchFilterExpressionConverter`#3950

sobychacko merged 1 commit intospring-projects:mainspring-projects/spring-ai:mainfrom

alxkm:test/OpenSearchAiSearchFilterExpressionConverterTestalxkm/spring-ai:test/OpenSearchAiSearchFilterExpressionConverterTestCopy head branch name to clipboard