[JNI] Cleanup MemoryBuffer/ColumnVector close methods to use common code

[abellina]

@gerashegalov had a comment in #15351 that I thought would make sense as a follow on. Specifically, we'd like to make a utility available in the JNI code so that classes that need to invoke onClosed can do so with the same common code.

          This is now inconsistent with (Host)ColumnVector. If we cannot consistently move eventHandler.onClosed into a finally please add a comment, but hopefully we can and it could be generalized via some utls withEventHandler(eventHandler) or base class implementation.

Originally posted by @gerashegalov in #15351 (comment)