Merge pull request #8976 from jasonmolenda/cp/r127518945-frameless-function-fault-backtrace-20230725

[lldb] Allow fetching of RA register when above fault handler (llvm#98566)

Author: jasonmolenda

lldb/source/Target/RegisterContextUnwind.cpp

@@ -1401,7 +1401,7 @@ RegisterContextUnwind::SavedLocationForRegister(
       // it's still live in the actual register. Handle this specially.
 
       if (!have_unwindplan_regloc && return_address_reg.IsValid() &&
-          IsFrameZero()) {
+          BehavesLikeZerothFrame()) {
         if (return_address_reg.GetAsKind(eRegisterKindLLDB) !=
             LLDB_INVALID_REGNUM) {
           lldb_private::UnwindLLDB::RegisterLocation new_regloc;