[lworld] C1 needs adjustments after JDK-8294866

JDK-8294866 is causing a lot of tests to crash because of an assert in C1 LIR generator:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/open/src/hotspot/share/c1/c1_LIRGenerator.cpp:1345), pid=92663, tid=38659
# assert(univ_klass_obj->modifier_flags() == (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC)) failed: Sanity
#
# JRE version: Java(TM) SE Runtime Environment (23.0+1) (fastdebug build 23-valhalla+1-57)


The assert needs to be updated to consider the presence of JVM_ACC_IDENTITY when the VM is in preview mode.