[runtime] Rename {JSGeneratorObject::operand_stack} field.

src/compiler/access-builder.cc

Index: src/compiler/access-builder.cc
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 540eb375b733f21540adc710f273d2c46d3741e3..d5a6f5c98d49887089cbe6faab2e3df9460ab8e5 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -167,9 +167,9 @@ FieldAccess AccessBuilder::ForJSGeneratorObjectInputOrDebugPos() {
 }
 
 // static
-FieldAccess AccessBuilder::ForJSGeneratorObjectOperandStack() {
+FieldAccess AccessBuilder::ForJSGeneratorObjectRegisterFile() {
   FieldAccess access = {kTaggedBase,
-                        JSGeneratorObject::kOperandStackOffset,
+                        JSGeneratorObject::kRegisterFileOffset,
                         Handle<Name>(),
                         Type::Internal(),
                         MachineType::AnyTagged(),