[FLINK-37213][table-runtime] Improve performance of unbounded OVER ag… #1595

Job	Run time
Default (Java 17) / Compile	40m 25s
Pre-compile Checks / Basic QA	10m 32s
Default (Java 17) / Test packaging/licensing	34m 54s
Default (Java 17) / E2E (group 1)	1h 20m 13s
Default (Java 17) / Test (module: core)	29m 57s
Default (Java 17) / E2E (group 2)	1h 52m 43s
Default (Java 17) / Test (module: python)	29m 3s
Default (Java 17) / Test (module: table)	35m 38s
Default (Java 17) / Test (module: connect)	19m 42s
Default (Java 17) / Test (module: tests)	35m 50s
Default (Java 17) / Test (module: misc)	23m 49s
	7h 32m 46s

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