Apparently rock matriarch Sharon Osbourne wants and is "desperate" to manage jazz singer Liza Minnelli. Minnelli, 59, has had a very rough year with numerous false claims of abuse, shallow sexual harrasment lawsuits, and numerous health and vocal problems. After her divorce to music producer David Gest in 2003, things have been downhill for the daughter of Judy Garland. Liza with a "Z" has had no management since her divorce and has managed to pull of a summer tour in 2004 all by herself. Despit …