Update to aarch64-shenandoah-jdk8u232-b01.
Switch to EA mode.
Drop JDK-8210761/RH1632174 as now upstream.
Drop JDK-8223219 as now upstream.
JDK-8226870 removed clhsdb and hdsdb from the JRE bin directory, so we should do likewise.
Add alternatives support for these two new SDK binaries.