[fix](Nereids) add int type alias 'integer'#25509
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cherry-pick from master PR: apache#25376 commit id: 934d828
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### What problem does this PR solve? Issue Number: close apache#25509 Related PR: apache#61248 Problem Summary: S3/OSS prefetch timeout can cancel and close PrefetchBufferedReader while an async PrefetchBuffer task is still running. The task kept PrefetchBuffer alive but only stored the underlying FileReader as a raw pointer, so the owner could destroy the reader before the async task resumed on the error path and logged reader metadata. Keep a shared FileReader reference in each PrefetchBuffer so the async prefetch task cannot outlive the reader it dereferences, and add a unit test that covers close timeout while the prefetch read is blocked. ### Release note None ### Check List (For Author) - Test: git diff --check; git diff --cached --check; attempted build-support/clang-format.sh and build-support/check-format.sh but llvm@16/clang-format is not installed; attempted ./run-be-ut.sh --run buffered_reader_test but it failed before running tests because JAVA_HOME points to JDK 11 and JDK_17 is not set - Behavior changed: No - Does this need documentation: No
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cherry-pick from master
PR: #25376
commit id: 934d828
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Issue Number: close #xxx
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