CRITIC'S NOTEBOOK
'Cabaret,' Soon to Close, Enriched the Theater by BRUCE WEBER</b><br /> Nobody doesn't like "Cabaret." O.K., that's probably an exaggeration, but unlike a lot of other long-running musicals you can name, nobody resents it. It never became a joke the way "Cats" did. It's not a symbol of corporate theater, as "The Lion King" is. You won't find anyone casting eyes upward in amazement at the taste of the theatergoing pub…