Summary: moved fields around and some constant fields into ConstantPool
This is a simple change except that I moved some constant fields from InstanceKlass into the constant pool so they can be shared read-only in the CDS archive. There are associated repercussions in SA and JVMCI, so please look at these changes. Also moved similarly sized fields together in the class so there's less likelihood of introducing gaps in future InstanceKlass changes.
InstanceKlass is reduced from 544 to 520 bytes in a simple Hello World class.
open webrev at http://cr.openjdk.java.net/~coleenp/2020/8238048.01/webrev bug link https://bugs.openjdk.java.net/browse/JDK-8238048 Tested with tier1-6. Thanks, Coleen
