Move JVM Klass flags out of AccessFlags

These flags have code generation that uses them, but are JVM implementation specific (not in classfile format). Move to Klass::_misc_flags.

  // Klass* flags
    JVM_ACC_HAS_FINALIZER = 0x40000000, // True if klass has a non-empty finalize() method
    JVM_ACC_IS_CLONEABLE_FAST = (int)0x80000000,// True if klass implements the Cloneable interface and can be optimized in generated code
    JVM_ACC_IS_HIDDEN_CLASS = 0x04000000, // True if klass is hidden
    JVM_ACC_IS_VALUE_BASED_CLASS = 0x08000000, // True if klass is marked as a ValueBased class